1. Even if you go there it won’t do any good. 去了也是白去的。
2. Never trouble yourself with trouble till trouble troubles you. 不要自麻烦。
3. 让每个人都能分到食物不是完全可能的。
It is not entirely right to say that if there is food, let everyone share it.
说有饭大家吃并不完全正确。
4.   When a substance changes only in state or in form, it is a physical change. ?
当一种物质只是改变状态或形式时,就是物理变化。
5. Radioactivity may cause illness that could be passed on to our children and grandchildren.放射 线可以引起遗传性疾病。
6. For generations coal and oil have been regarded as the chief energy sources used to transport men form place to place.几十年来，煤和石油一直被认为是交通运输的重要能源。
7. Patients with influenza must be separated from the well lest the disease should spread from person to person.流感病人必须与健康的人隔离以免疾病传播。
8. These developing countries cover vast territories encompass a large population and abound in natural resources. 这些发展中国家,土地辽阔,人口众多,资源丰富。
9. Scientific exploration, the search for knowledge has given man the practical results of being able to shield himself the calamities of nature and the calamities imposed by other man.
译文a：科学的探索，知识的追求，使得人们有了避免自然灾害和他人施加的伤害的实际能力。
译文b：科学的探索，知识的追求，使人们获得了避免天灾人祸的实际能力。
10. Every river has its upper, middle and lower reaches.
Each river has upstream, midstream and downstream
11. 人们利用自然科学去了解自然,改造自然。
People use natural science to understand and change nature.
12. We should develop the students' ability to analyse and solve problems.
13. 多年来那个国家一直存在严重的失业现象。 For many years there has been serious unemployment in that country.
14. resources翻译 Live or die, we should be loyal to our Party, to our people and to our motherland
15. Independent, relies on one's own effort to revive, regardless of the past, the present and the future, all will be our standpoints.