1.概念:科学是什么:发现，累计，并公认的普遍真理或普遍定理的应用，已系统化和公式化了的知识。
科学包括:Natural science and Social science.
2.怦然心动的单词:
bring out引起，导致
inquiring爱探索的
initiative首创精神，主动
civilization文明
3.最喜欢的话:
The word today is filled with dangers ,hence the sick joke that the reason we have not been contacted by an alien civilization is that civilizations tend to destory themselves when they reach our stage.
4.知识点
(1)play a large role 发挥重要的作用
(2)leading scientist =famous scientist
(3)keep everybody in touch with =have a understanding on sth.
(4)a great of sth.(修饰不可数名词)
(5）be highly risky for sb.
(6)put/turn the clock back倒退
(7)life-expectancy寿命
(8)global state全球政府
(9)slow dowm减缓
(10)in two minds犹豫不决
(11)standard of living生活水平
(12)acid rain酸雨
(13)greenhouse effect温室效应
(14)nuclear weapons核武器
(15)acxurate ways
(16)popular book通俗读物
(17)precise values of quantities数的精确值
(18)fit into成为...的一部分
(19)have sufficient faith in
(20)in term of 依据；在某方面
5.学习中的困难:
(1)长难句的理解
(2）某些单词不认识
6.感受收货
(1)觉得这单元的课明显比第一单元的课文难
(2)但也学到很多新单词和新短语
(3)也理解了很多长难句
7.对老师的建议:
老师讲的很好，但是可以再讲的快一点
