The environment is everything around us,for example,air,water,animals,plants,buildings and so on.They all affect us in many ways and closely related to our lives.People can't live without the environment.Everybody needs to breathe air,drink water and eat food every day.We burn coal to keep warm,and we use wood to make paper.As a result,we bee the part of the environment.
The environment has been getting wores and wores for many years.
采用微波法以蔗糖为原料，浓盐酸为催化剂和酸化剂，经中间产物5-羟甲基糠醛，再脱羧生成产物乙酰丙酸和副产物甲酸。
实验结果表明，在盐酸浓度为4mol/L，蔗糖浓度为50g/L，反应时间5min，微波功率为70%的条件下可以达到乙酰丙酸的最大产率52.4%。
较文献值产率22.4%有明显提高。
Based on the microwave method with using sucroses as raw materials and concentrated hydrochloric acid as catalyst and acidifier,a product of levulinic acid and formic acid by-products are generated by the intermediate product 5 - hydroxymethyl-furfural and decarboxylation. The experimental results have shown under the condition that the concentration of hydrochloric acid being 4mol/L, the concentration of sucrose being 50g/L and 70% of the microwave power being used with a five-minute reaction time, the most maximum acid production can be reached at the rate of 52.4%. It is obviously improved pared with the rate 22.4% on the literature value.
In reaction to the phenomenon of potassium water experimental *** ysisExplore the phenomenon of potassium reaction with water. Experiment proves, in the open system, potassium reaction with water and bustion, burning essence is the hydrogen potassium and reaction in air bustion. In kerosene, potassium and water protection not only reaction.
由于有字典的帮忙，使我写一篇简单的作文，没有问题。
今天的日常生活在五十年前是不敢想，毫无疑问化学在其中起到了难以磨灭的作用，那么，同样的，未来的生活中化学会怎样的改变我的生活呢，会不会有一种穿在身上冬暖夏凉的衣服呢 会不会不用吃天然的肉，改吃人造的肉呢，会不会天然的屋子具有生态系统 会不会汽车变成以水为燃料呢？ 我接触化学这门学科也有时日然而谁能聪明到可以预言在可预见的未来，化学将会怎样更彻底的改变我们的生活呢。
50 years ago, You could hardly imagine any of the today's life It is no definitly that chemics has already changed our life every inch.I can't help but ask myself Wether is it What will have to happen in the future days that chemics entirely changed the our custom or not. Wether is it there being a kind of clothing wich keep cools in the summer and warms in the winter,or we eating meat produced artificially rather than by a natural process as dinner,or we having the living room with a healthy ecosystem.And what most probably,our vehicle would burn water merely. It's not a short time that I 've learned chemics as my major.Nevertheless who got a cute vision to predicte that in the near future how will the chemics pletely change my life .
Dear Mr. Vice-Chancellor: Hello! I am a XX year XX Chemical College graduates, graduating in a time when all I have to do a good job of preparation, there is sufficient confidence and capacity to engage in teaching and research work in chemistry. Sincerely hope that your school can teach, in effect you are under. Comparison of the character I cheerful, straightforward man, peace love love love爱闹laugh, but able to get things done in a serious sense of responsibility, and thinking more active, with a strong sense of innovation and capabilities. While studying at the school, majoring in chemistry and chemical with the curriculum and teaching-related experiments, the optional education, psychology, philosophy, the legal basis for such courses, a serious effort to learn, excellent results. Teaching practice, the active-depth classes, the careful study of teaching, with an open mind to seek division, made rapid progress in education by teachers and students alike, outstanding internship performance. I am quite confident that their abilities, he directed and starred piece ＂youthful dream to fly,＂ drama ＂Memory of Youth＂, also anized dance with my clas *** ates had a rehearsal ＂happy home＂, ＂Chashan love＂, ＂Hongmei Chan, ＂and so on, also participated in dance petitions like school performance; I actively participate in school activities association training, also own the＂ Changchun Evening News ＂part-time clerk, in-depth munity, the feelings of a lot; St. Paul, I have to create ＂dusty studio,＂ Contact tutor for students to work to taste the hardships of the pioneering joy and success. After I contacted by phone to Zhejiang Pinghu internship, during the visit of the Soviet Union, hang o states, after Beijing, Shanghai, Dalian stop when they are, a simple march-site inspection, as a graduate to choose a reference direction. I am a brave people who dare to do, like at the moment, I think of their own future, are also doing their own efforts. Make a good teacher is what I have been ideal; I have high education is people-oriented, individualized education. Education, teachers, schools should be a service for students. For all students, for students of all, I would like to use my life energy, carefully nurtured garden peach! Finally, thank you for your busy schedule to read my自荐信， but also hope to have the opportunity to personally thank you!
对应的英语：My chemistry teacher is a young lady. She is attractive. We all, partically for those male teenagers, like having her lessons, and appreciates her chemical knowledge and experimental skills. She is nice and kind to us except that we make her to anger such as someone plays mobile phone in her class. She is the teacher who is in charge of our class. So we all work hard to make sure that she won't be disappointed at our exams.
Chemical class is the pulsory course in the middle school.It isone of my favorable classes.When I first contact with this subject,I aminterested in it.In my mind,it is miracle.It can see the nature of object.For example,through chemical class,I learn how does water form.Knowing this makes me feel like a little talent.I have a great sense of achievement.Maybe it is my curiosity makes me like this class so much.To be honest,to explore knowledge is very excited and interesting.
如果学文的话，主三门一定要好，历政地都拉不开太大差距，但是数学好很提分……如果学理的话，就要求你必须面面俱到了，英语是拉开差距的科目…… 不管学文学理，重要是看自己的爱好以及未来的志愿和理想……不管学什么，主三门一定要好希望你选择正确……
乡村的四季，美如画.春，夏，秋，冬，都是一幅幅迷人的画卷.春季，光秃秃的草木，又长出了嫩芽.它们在春雨中生长起来.这时，花儿绽开了柔嫩的小脸，遍野都是望不到边的绿海，衬托着红的，白的，黄的……小花，把草地染成五颜六色的，一阵微风吹来，浓郁的花味飘远了.春季飞一般地离开人间，乡村马上迎来了烈日炎炎的夏天.初夏，乡村的原野既是活跃的，又是美丽的.天上的白云悠闲地飘着，广阔的大地上三三两两的农民伯伯扛着锄头，辛勤地劳动着.柔嫩的柳丝低着头，像是为辛勤的农民遮住烈日的炎热.火热的夏天带来了秋姐姐，迎面送来的秋风，让乡村的人心旷神怡.秋风把田野刮成了金黄的.稠密的大豆子，老远望去一片土黄色.每户人家门口，还挂着成熟的辣椒.白色的小野菊顽强地从草地里探出头来，在秋风下微微抖动身子.秋去冬来，冬爷爷把村子金黄的树叶盖上了雪白的棉被，给屋顶戴上了白色帽子.也给了连绵起伏的山，铺上了一层厚厚的大被子.
摘要：一1,2环氧化物水在各种Thiolysis30 ° C和pH值7.0的强烈加速氯化锌（10摩尔%）除非氨基酸和carboxythiophenol使用。
该水相介质及催化剂的回收和再利用在各种运行而不会影响该过程的效率。
介绍该A - hydroxysulfide单位目前的化合物生物及药理interest1，是通用基团合成烯丙醇，benzoxathiepines,benzotiazepines，的R - thioketones，研究取代R是不饱和enones，和A - hydroxysulfoxides使用在天然化合物的合成。
最简单的访问，hydroxysulfides是thiolysis1,2，也就是通常进行了环氧有机溶剂（四氢呋喃，二氯甲烷，甲醇，乙腈，或心理健康热线）通过使用硫醇在碱性conditions8或存在的助剂和/或催化剂
转载请注明出处 » 化学对人们好处和坏处的英语作文
To begin with, chemistry is known as the central science, which means it has close relationship with almost every field of modern science. With the development of mathematics and physics, approaches and theories of chemistry research is eminently advanced while applied chemistry promotes the research works of biology, enviromental science, information technology, etc. It was alleged that 20th century is the century of physics and 21th century is the century of life science and information science. However, thanks to the proposal of quantum theory, theoretical chemistry was greatly boosted and similarly, without the improvement of chemistry, especially analytical and synthetical methods, life science and information technology will face their bottlenecks. Thus, it can be claimed that both 20th and 21th centuries can be considered as the centuries of chemistry.
Secondly, chemistry permeates into nearly every corner of human life and society. For example, a large part of clothing manufactured today are at least partly made of synthetic fiber and stained by organic dyes. Besides, there can hardly find any food without additives. Moreover, though the utilization of artificial fertilizers and pesticides are criticized a lot, without these things, most of human beings on this planet would suffer from famine. In addition, advanced materials provides firmer packages, warmer houser, and safer transportation.
The last but not the least, chemistry is the discipline which I love. As is known to all, interest is the best teacher. Therefore, I believe I can learn it well. That's why I choose it as my major.
化学专业本科生飘过，肺腑之言。
喔 顺便一提，我现在学的ABC天卞口语的老师说过，如果要掌握好英语是不难的！必然有个好的研习环境与闇练口语对象 最关键就是外教水平，口语纯正才是最好 保持经常口语练习 1&1针对性教学才可以有更.好.的进步效率；上完课记得重听课堂音频，把所学知识融会贯通~若真的是没有人可以指导的话 只能上旺旺或大耳朵获取课外教材研习，多问多听短时间语境会提高起来，整体效果应该可以迅速明显的；这些是考试词汇,应该有用Part1foundationchemistry基础化学Chapter1acid酸apparatus仪器，装置asueoussolution水溶液arrangementofelectrons电子排列assumption假设atom原子（化学变化中的最小粒子）atomicmass原子量atomicnumber原子序数atomicradius原子半径atomicstructure原子结构becomposedof由……组成bombardment撞击boundary界限cathoderays阴极射网cathode-rayoscilloscope(C.R.O)阴极电子示波器ceramic陶器制品charge-clouds电子云charge-to-massratio(em)质荷比（质谱分析时样品质量的测量以质量与其离子电荷之比表示）chemicalbehaviour化学行为chemicalproperty化学性质（物质在化学变化中表现出来的性质）clockwise顺时针方向的compound化合物（由不同元素组成的纯净物）configuration构型copper铜correspondto相似corrosive腐蚀d-blockelementsd区元素deflect使偏向，使转向derivefrom源于deuterium氘diffusemixture扩散混合物distanceeffect距离效应distil蒸馏distinguish区别distribution分布doublycharged(+)ion正二介离子dye染料effectofelectriccurrentinsolutions电流在溶液里的影响electricalcharge电荷electricalfield电场electricallyneutralatom电中性原子electri电electrolysis电解electron电子（负电荷粒子，电量等于.×10-10绝对静电单位）electronselding电子屏蔽element元素（具有相同核电荷数即荷内质子数的一类原子的总称）emissionspectrum发射光谱（根据发射光源和激发能量方式所产生的特征电磁波谱）energylevel能态，能级（稳态能量，有相同主量数的电子壳层）fertiliser肥料firstioniionenergy一级电离能fluorescentscreen荧光屏fluoride氟化物fuel燃料fundamentalsubstance基础物质fuzzy模糊的galaxy星系，银河gas气体gaseousstate气态gravity重力GroupⅠ第一族Heisenberg’suncertaintyprinciple海森堡测不准原理hydrofluoricacid氢氟酸identical同一的，相等的intermsof根据，在……方面innermost最内的，最深的interaction相互作用internalstructure内部结构interpret解释investigate研究,调查ioniionenergy电离能（从原子或分子中移走一个电子至无穷远处所需的能量，以电子伏特eV表示）ionise电离isotope同位素（原子里具有相同的质子数和不同的中子数的同一元素的原子互称同位素）J.J.Thomson’semexperiment汤姆森质何比实验Latin拉丁lepton轻粒子lisuid液体magnet磁铁magneticfield磁场MalteseCross马耳他十字marble大理石massnumber质量数matter物质metalfoil金箔meteorite陨星microbe微生物，细菌Millikan’s‘oil-drop’ecperiment密立根油滴实验model-building模型建筑mole摩尔（表示一个系统的物质的量的单位，该系统中所包含的基本单元数与1g碳1即1C的原子数目相等,每摩尔物质含有阿佛加德罗常数个微粒）molecule分子（保持物质的化学性质的最小粒子）narrowbeam狭窄的光网negativeelectrode（cathode）阴极negligible可以忽略的neutron中子nitrate硝酸盐noblegas稀有气体normalpressures常压nuclearcharge（原子）核电荷nuclearmodelforatoms原子核模型nuclearreaction核反应nucleus（pl.nuclei）核Orbital轨道paraffinwax石蜡particle微粒，粒子Pauliexclusionprinciple保里不相容原理（每个原子轨道至多只能容纳两个电子；而且，这两个电子自旋方向必须相反）PeriodicTable周期表physicalproperty物理性质（物质不需要发生化学变化就表现出来的性质，如颜色、状态、气味、熔沸点、密度等）plastics塑料plum-pudding李子布丁positivecharge正电荷（带有质子的物质，用丝绸摩擦玻璃棒，在棒上会产生正电荷）positiveelectrode(anode)阳极positivelychargedparticle(ion)离子potentialdifference电位prediction预言principalsuantumnumber主量子数（标示轨道电子的波函数，包括轨道角动量和自旋量子数，电子的能级和距原子核的平均距离主要取决于主量子数）probe探测，探究protium氕proton质子suantum（pl.suanta）量子（一个电子转移到原子的下一层轨道时发出的有限辐射能单位）suantummechanics量子力学suantumTheory量子理论suark夸克（组成基本粒子的更小的粒子）radioactivesource放射源repel排斥repulsion斥力respectively分别地rung梯级scatteringeffect散射作用Schr?dingeresuation薛定谔（波动）方程（一偏微分方程，描述基本粒子波动性）scintillation火花shell电子壳层seldingeffect屏蔽效应simplersubstance单质（指由同种元素组成的纯净物）solid固体sphere球spin自旋stablestate稳态sub-atomicparticle原子内的粒子subset子集，小团体successiveioniionenergy逐级电离能symbol符号symmetry对称thelowest-energyorbitals最低能量轨道transitionelements过渡元素tritium氚X-rayX射网α-particlesα粒子，即alpha-particle（带有两个质子和中子的粒子，即氦原子核，对物质的穿透力较强，流速约为光速的110）α-rayα射网β-particlesβ粒子β-rayβ射网γ-patticlesγ粒子γ-rayγ射网
采用微波法以蔗糖为原料,浓盐酸为催化剂和酸化剂，经中间产物5-羟甲基糠醛，再脱羧生成产物乙酰丙酸和副产物甲酸。实验结果表明，在盐酸浓度为4mol/L，蔗糖浓度为50g/L，反应时间5min，微波功率为70%的条件下可以达到乙酰丙酸的最大产率52.4%。较文献值产率22.4%有明显提高。
Based on the microwave method with using sucroses as raw materials and concentrated hydrochloric acid as catalyst and acidifier,a product of levulinic acid and formic acid by-products are generated by the intermediate product 5 - hydroxymethyl-furfural and decarboxylation. The experimental results have shown under the condition that the concentration of hydrochloric acid being 4mol/L, the concentration of sucrose being 50g/L and 70% of the microwave power being used with a five-minute reaction time, the most maximum acid production can be reached at the rate of 52.4%. It is obviously improved compared with the rate 22.4% on the literature value.
许多已知的冰阶段表现出了质子订购
转型，例如从质子无序
六角冰（星期四）以质子下令冰十一.1最近，两个
新质子命令冰阶段（十三和十四）已reported2
有关冰第五和第十二， respectively.Preparation若干冰
阶段并不简单，这解释了为什么直到最近，
只有一个新的冰阶段已经发现在过去20 years.3
特别是，排列形式的冰可能难以孤立内
该实验室因为动力学障碍分子轮换
是重要的低temperatures.Computer仿真提供了一个
辅助方法，在其中的影响，压力，温度，
和配置可以名义上控制十分精确，以
允许系统测绘阶段diagram.However的
Verity的任何模拟方法取决于其生育能力
不同的国家分相diagram.As挑战理论，
我们最近进行了一项双盲试验预测质子有序
形式的冰第十二称为冰十四。
虽然每个冰氧原子必须四面体协调员
化（在一个完美的网格） ，氢原子可能是无序的。
安排的质子在一个冰结构的确定
由贝尔纳福勒冰rules4其中规定： （ 1 ）必须有
两个氢原子毗邻每个氧气和（ 2 ）必须有
只有一个氢每表明，氢bond.Pauling5
任何冰阶段大约有（ 3 / 2 ）不适用何种方式
氢原子可安排，并建议所有可能的
结构的某一阶段是degenerate.However ，存在
质子命令无效这一阶段postulate.The质子
命令阶段有不同的特性从无序母公司
阶段，例如，冰七可以转化为质子下令冰
八的相关变化，晶胞参数和密度。
