重点讲解：
1. as of 在…时；从…起；自…始；
例句：As of this afternoon, the festival site appeared to be up and running once again.
到今天下午为止，电影节网站看似已经恢复运行。
2. compared to 与…相比；和…比起来；
例句：It would show much higher capacity compared to the wild type.
其能力较野生型高。
3. a number of 若干；许多；
例句： I seriously question a number of your assertions.
对你所坚持的说法，有几点我甚为怀疑。
4. cope with （成功地）处理，应付，对付；
例句：Fit people are better able to cope with stress.
健康的人较能应付压力。
5. 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。
6. lead to 招致；致使；导致；
例句：The bad harvest led to severe food shortage.
歉收引起食物严重短缺。
