重點講解:
1. serve as 擔任;任職;
She was elected to serve as secretary of the local party.
她當選為地方黨組織的書記。
2. be familiar with 熟悉;熟知;
Tom i s quite fa miliar with the author.
湯姆很熟悉那位作家。
3. be set to do sth. 做好準備的;可能的;
The price of cigarettes is set to rise again.
香煙又要漲價。
4. stem from 起源于;來自;由…造成;
All my problems stem from drink.
我所有的問題都源于酗酒。
n. 疫苗