写论文摘要时以一般现在时为主。
介绍背景知识时，要用一般现在时，例如：
Speech recognition is the task of converting speech into text.
语音识别是将语音转换成文本的任务。
叙述研究现状时，也可以用一般现在时，例如：
This essay is to analyse how the era influences corporate cultures, and to give suggestions on the building of corporate cultures.
本文旨在分析时代对企业文化的影响，并对企业文化建设提出建议。
叙述研究结果时，大多数用一般过去时，例如：
Our text achieved the possibility above.
我们的文本实现了上述可能性。
Title:On the crime of polluting the environment
Abstract: with the development of China's economy and the improvement of productivity, environmental pollution is becoming increasingly serious, the judicial practice of the crime of major environmental pollution accident before the difficult to play a role in the "criminal law amendment (eight)" after the introduction of the crime of major environmental pollution accident has made great changes, but there is still insufficient. How to make the crime of the new pollution environment better play a role in the judicial practice is one of the key issues of environmental governance at present.
The first chapter is an overview of the crime of polluting the environment, mainly about the concept and characteristics of this crime; the second chapter is the key elements of the crime of polluting the environment of the paper, mainly from the object of the crime, the objective aspect and subjective aspect, the objective aspect of crime, crime analysis results and the type of crime, the subjective aspect of the imputation principle of the key discussion; the third chapter is the identification of environmental pollution crime, mainly discusses the definition of the crime of crime and non crime, illegal disposal, the difference between causation and other crimes, and then discusses the legal punishment of the crime; the fourth chapter is about the suggestions, mainly is to refine the charges and increase the types of penalties.
Key words: criminal law; criminal law amendment eight; environmental pollution
