重点讲解：
1. comb through 在(信息)中仔细搜寻；
例句：Eight policemen then spent two years combing through the evidence.
之后8位警察花了两年时间搜寻证据x=xCuM8;i1#qO^wm(+p(。
2. differentiate from 区分；区别；辨别；
例句：At this age your baby cannot differentiate one person from another.
这个年龄的婴儿还不能认人C.nic.Tw2)L3v。
3. sift through 细查；详审；
例句：We sift through the information carefully to find a clue that will help us.
我们仔细研究资料以便找出对我们有帮助的线索OzaVoq]ckXI=^。
4. tease out 套取，套出，巧妙获得(信息或答案)；
例句：They try to tease out the answers without appearing to ask.
他们试图不动声色地套出答案b=MzhQB(o6+8D!rAa。