ISSUE 求二拍 已经修改了

lukebrehm

1. It might be true in some field(s),
2. which is (are) not likely to benefit the greatest number people only for now (replace ONLY FOR NOW with RIGHT NOW).
3. the most people of (in) the world.
4. we should pay (focus) our attention to (on) the field(s) that could (will) make
5. not only considering our own profit.  -not-  not only considering the profit of ourselves.
6. to the field that perhaps the one (omit, THE ONE) would (could) bring our life to doom such as nuclear research,
7. lead to a potential disaster to >this< planet.
8. The goal of the (omit, THE) scientist(s) is to use
9. knowledge of law of (and) nature to change the world.
10. spent a lot (replace A LOT with MANY) of (omit, OF) years researching the (omit, THE) hybrid-grain,
11. with (omit, WITH) his super grain not only contribute(d) to the output (produce) of Chinese agriculture in total (omit, IN TOTAL), but also saved a lot (replace A LOT with MANY) of (omit, OF) life (lives) in Africa.
12. What he did benefited people internationally and even qualified him to get a tenure of Professor in Harvard, his research not only benefited himself but also had a positive effect on human beings on the planet as a whole.  -not-  What he did benefit a international wide people and even made him the qualification to get a tenure of Professor in Harvard, which not only benefit himself but also have a positive effect on the whole human being on the planet.

lukebrehm

You have to understand that how persuasive you are is something that you either have or don't have, what you need to learn is how to express your self correctly. You can't skip these important steps, perhaps you can be very persuasive but a native English teacher (who has to score your essay) might not understand you clearly and would therefore give you a very low grade. I think you are smart enough to be persuasive on your own but you just need to make sure people can understand you.