1.in addition 另外;此外;加之
例句:In addition, he said, the drug's dosing schedule is only once per month.
此外,这种药物的给药方案只能是每月一次。
2.the absence of 缺乏...
例句:The absence of such a philosophy has been a great failing.
缺乏此类哲学一直是一个重大失败。
3.track down 追捕到;查出;追踪
例句:FBI is trying to track down the hacker.
FBI正在努力追踪黑客。
4.watch over 监视
例句:It is not very effective to watch over our children shoulder to keep an eye on what they are doing in the computer.
当不在孩子身边时,我们无法有效监视他们在电脑上干什么。