重点讲解：
1. contribute to （为…）做贡献；
例句：This new discovery will contribute to all humanity.
这个新发现将对全人类作出贡献。
2. according to 据…所说；按…所载；
例句：According to Noy, fear is both natural and expected.
而在诺伊看来，害怕是很自然的，也是意料之中的。
3. as well as 除…之外；也；还；
例句：She takes private pupils as well as teaching in school.
她除在学校任教外，也私自教授学生。
4. so as to do sth. （用于引出原因）为了；以便；
例句：The book will be indexed in the next edition so as to make it more useful.
为了使它更实用，这本书在下一版本中将编有索引。
5. account for （数量或比例上）占；
例句：Cotton account for 70% of our export.
棉花占我们出口的70%。
6. instead of 代替…；而不是…；
例句：The roof was slated instead of thatched.
那个屋顶不是用草而是用石板盖的。
