1 In this unit,I learnt much konwledge about the public attitudes toward science.As far as I am concerned,it is important that we should make the public kown the science importance,otherwise the public will fear some advanced  technology.

2 some words

privileged 有特权的   minority 少数   pure纯净的 nasty 令人难受的 moreover 而且   suppress 抑制，压制  initiative 首创精神，主动   democratic 民主的  inform 通知   steady 平稳的    evident 明显的  element 成分  astronomy 天文学 rote 死记硬背   grasp 掌握   convey 传达，表达  entertain 招待  hence 因此  alien  外国的

3the sentence  I like

Scientists and engineers tend to express their ideas in the form of equations because they need to know the precise values of quantities.But for the rest of us,a qualitative grasp of scientific concepts is sufficient,and this can be conveyed by wors and diagrams,without the use of equations.

I like this paragraph because it describe the reason why the scientists learn the scientific concepts are different from the public.

4 the knowledge

 Nor can one prevent further advances in the future.为倒装句

at the moment 此刻，目前    in two minds 犹豫不决  fit into 适合，属于   scientific concepts 科学概念

5 the difficulty in the essay

This essay like a report,so it is difficult for me.Moreover it has some words which is used in the science report.

6 This essay told me the science is import,but we known it little.