重点讲解:
1. because of 因为;由于;
例句:She could only croak because of her heavy cold.
她因患重感冒只能用沙哑的声音说话 。
2. used to do sth. 过去常常;过去曾;
例句:My uncle used to commute ten miles to the city.
我的叔父过去每天要走10英里到城里去 。
3. even if 即使;尽管;纵然;
例句:Even if I have to walk all the way I'll get there.
即使一路走着去,我也得赶到那里 。
4. in regard to 关于;至于;
例句:I have nothing to say in regard to that subject.
对那个问题,我没有什么要说的 。
n. 净化,提纯,[宗]涤罪