大一英语论文500字

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Consider...YOU. In all time before now and in all time to come, there has never been and will never be anyone just like you. You are unique in the entire history and future of the universe. Wow! Stop and think about that. You're better than one in a million, or a billion, or a gazillion... You are the only one like you in a sea of infinity! You're amazing! You're awesome! And by the way, TAG, you're it. As amazing and awesome as you already are, you can be even more so. Beautiful young people are the whimsey of nature, but beautiful old people are true works of art. But you don't become "beautiful" just by virtue of the aging process. Real beauty comes from learning, growing, and loving in the ways of life. That is the Art of Life. You can learn slowly, and sometimes painfully, by just waiting for life to happen to you. Or you can choose to accelerate your growth and intentionally devour life and all it offers. You are the artist that paints your future with the brush of today. Paint a Masterpiece. God gives every bird its food, but he doesn't throw it into its nest. Wherever you want to go, whatever you want to do, it's truly up to you. 试想一下……你！一个空前绝后的你，不论是以往还是将来都不会有一个跟你一模一样的人。你在历史上和宇宙中都是独一无二的。哇！想想吧，你是万里挑一、亿里挑一、兆里挑一的。 在无穷无尽的宇宙中，你是举世无双的！！！ 你是了不起的！你是卓越的！没错，就是你。你已经是了不起的，是卓越的，你还可以更卓越更了不起。美丽的年轻人是大自然的奇想，而美丽的老人却是艺术的杰作。但你不会因为年龄的渐长就自然而然地变得“美丽”。 真正的美丽源于生命里的学习、成长和热爱。这就是生命的艺术。你可以只听天由命, 慢慢地学，有时候或许会很痛苦。又或许你可以选择加速自己的成长，故意地挥霍生活及其提供的一切。你就是手握今日之刷描绘自己未来的艺术家。画出一幅杰作吧！ 上帝给了鸟儿食物，但他没有将食物扔到它们的巢里。不管你想要去哪里，不管你想要做什么，真正做决定的还是你自己。 本文来自: 恒星英语学习网() 详细出处参考：

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1 Department of Community Medicine, University of Hong Kong, 21 Sassoon Road, Pokfulam, Hong Kong, China,2 Department of Health, Student Health Service, 4/F Lam Tin Polyclinic, Kowloon, Hong Kong, China,3 Nuffield Department of Clinical Medicine, University of Oxford, Oxford OX2 6HE Introduction Passive smoking can cause death from lung cancer and coronary heart disease, but there is little evidence for associations with other causes of death in never smokers. A recent study showed increased all cause mortality with exposure to secondhand smoke at home but did not examine associations with specific causes of death and dose-response We have published estimates of the mortality attributable to active smoking in Hong Kong2 and now present the related findings on passive smoking at home. Participants, methods, and results Details of the sample selection and data collection have been Each person who reported a death in 1998 at four death registries was given a questionnaire which asked about the lifestyle 10 years earlier of the decedent and of a living person about the same age who was well known to the informant. Passive smoking was identified in the interview with the question, "Ten years ago, in about 1988, excluding the decedent/control, how many persons who lived with the decedent/control smoked" Decedents or controls who lived with one or more smokers were classed as exposed. Cause of death was obtained from the death certificate. We selected never smoking decedents and controls aged 60 years or over because there were few younger controls. To avoid selection bias, we included only cases and controls who had a living spouse at the time of reporting. We used logistic regression to derive odds ratios adjusted for age and education, and for sex when men and women were combined. What is known on this topic There is strong evidence that passive smoking is causally associated with death from lung cancer, coronary heart disease, and all causes, and also with acute stroke What this study adds The dose-response relation between passive smoking and mortality from stroke and chronic obstructive pulmonary disease, as well as from lung cancer, ischaemic heart disease, and all causes of death, strengthens the causal link We identified 4838 never smoking cases (55% male) and 763 never smoking controls (55% male). All controls were used in the analysis for each specific cause of death. We found significant dose dependent associations between passive smoking and mortality from lung cancer, chronic obstructive pulmonary disease, stroke, ischaemic heart disease, and from all cancers, all respiratory and circulatory diseases, and all causes (table). The association between mortality and passive smoking did not differ between males and females. Deaths due to injury or poisoning were not associated with passive smoking. Number of subjects who were or were not exposed to secondhand smoke at home and odds ratios (adjusted for age and education, and for sex when men and women were combined) for mortality in people aged 60 or over, Hong Kong. Values are odds ratio (95% confidence interval) unless indicated otherwise Comment Dose dependent associations between passive smoking and causes of death are consistent with previous findings for lung cancer and coronary heart disease and extend the evidence on stroke. Previous studies have shown associations between passive smoking and first acute strokes,3 4 and we have now shown a dose-response relation with mortality from stroke. Previous studies focused on ischaemic strokes but Chinese populations have a greater incidence of haemorrhagic stroke than do white populations,5 implying that many of the strokes in our study may have been non-ischaemic. Passive smoking probably affects all stroke subtypes, as does active smoking. Our finding of a 34% increase in all cause mortality is consistent with but higher than that (15%) in the New Zealand Exposure to secondhand smoke at home is higher in Hong Kong than in New Zealand due to crowded living conditions. Before the 1990s, awareness of the danger of passive smoking was lower and smokers smoked freely at home. We focused on passive smoking at home because the proxy reporter could most reliably supply these data, and we adjusted for education, which was also reliably recorded2 and is a good proxy for social class in Hong Kong. As data on cases and controls were derived from the same proxy, reporting bias should be If our results are not due to residual confounding, they provide further evidence that the dose-response associations between passive smoking and stroke and all cause mortality are likely to be causal. See Editorial by Kawachi This article was posted on on 27 January 2005: We thank W L Cheung for help with analysis; the Immigration Department of the Government of the Hong Kong Special Administrative Region for data and assistance; and, in particular, the relatives who provided information. Contributors: THL, SYH, AJH, KHM, and RP designed and carried out the study on which this analysis was based; SMcG, MS, LMH, and GNT planned and carried out this analysis; and all authors contributed to writing the paper. SMcG and THL are guarantors. Funding: Hong Kong Health Services Research Committee (#631012) and Hong Kong Council on Smoking and Health. Competing interests: THL is vice chairman and AJH a former chairman of the Hong Kong Council on Smoking and Health. Ethical approval: Ethics Committee of the Faculty of Medicine, University of Hong Kong. References Hill SE, Blakely TA, Kawachi I, Woodward A. Mortality among never smokers living with smokers: two cohort studies, 1981-4 and 1996-9. BMJ 2004;328: 988-9. Lam TH, Ho SY, Hedley AJ, Mak KH, Peto R. Mortality and smoking in Hong Kong: case-control study of all adult deaths in 1998. BMJ 2001;323: 361-2. Bonita R, Duncan J, Truelson T, Jackson RT, Beaglehole R. Passive smoking as well as active smoking increases the risk of acute stroke. Tobacco Control 1999;8: 156-60. Iribarren C, Darbinian J, Klatsky AL, Friedman GD. Cohort study of exposure to environmental tobacco smoke and risk of first ischemic stroke and transient ischemic attack. Neuroepidemiology 2004;23: 38-44. Kay R, Woo J, Kreel L, Wong HY, Teoh R, Nicholls MG. Stroke subtypes among Chinese living in Hong Kong: the Shatin stroke registry. Neurology 1992;42: 985-7.

脑子有问题啊，SB

EarthDay originally celebrated at Spring Equinox around March 20, is an annualday on which events are held worldwide to increase awareness and appreciationof the Earth’s natural environment. Now Earth Day is coordinatedglobally by the Earth Day Network,and is celebrated in more than 175countries every 2009, the United Nations designated April22 International Mother Earth最初，地球日是在每年的春分，也就是三月二十号，这一天世界各地都会进行各种活动，希望能够增强人们的环境意识。现金，在同名组织“地球日组织”的协调下，地球日每年都在超过175个国家进行。 2009年，联合国指定每年的四月二十二号为世界地球日。People are more active doing something which isfriendly to the environment on Earth Day, like saving water, collectingrecyclable waste, reducing the uses of chemical materials which could pollutethe environment, etc..世界地球日这一天，人们会更加主动地去做一些有益于环境的事情，例如，节约用水，回收可再回收利用的废物，减少可能造成环境污染的化学物质的使用等等。Nowadays our world is highly developed with the improvementof technology. The wide use of technology helped us build factories,laboratories, mines, dams and all kinds of facilities which are supposed to dogood to the mankind. And of course they have brought and are still bringing usbenifits. But in the meanwhile they are causing and will be keeping causingserious environmental problems, such as all kinds of pollutions, the damage tothe ozonosphere and so on. And with the growing population of mankind, We areacctually ravaging the living condition of other species, which would cause theimbalance or even collapse of the ecosystem.现今，科技的发展带来了整个世界的高度开发。在科技广泛应用的帮助下，我们建立了各种各样的工厂，实验室，矿场，水坝以及其他所有的能够给人类带来益处的设施。这些设施在带给我们利益的同时，也对环境产生了严重的影响，例如，各种形式的污染，对臭氧层的损伤等等。同时，人类人口的增长，我们也在不停地掠夺其他物种的生存环境。这很有可能造成生态圈的失衡甚至是崩溃。Acctually we can treat everyday as the Earth Dayand be aware of environmental protection all the time. In which way, our motherearth could be protected and she would be able to support us much longer.其实，我们可以把每一天都当做世界地球日，每天都有意识地保护环境。这样，我们才能够保护我们的地球，她也能够更长久地养育我们。