1.be able to 能夠
例句:We want a man who must be able to cost.
我們需要一個能計算成本的人 。
2.start to 開始
例句:There has been a busy start to polling in today's local elections.
今天地方選舉的投票一開始就人頭攢動 。
3.operating system 操作系統
例句:The virus has infected the operating system of his computer.
病毒已使他的計算機操作系統受到傳染 。
4.come as 來作為
例句:It didn't come as a great surprise to me, I might say.
可以這么說,這并沒有令我大吃一驚 。