重点讲解：
1. come down to (问题、决定等)归结为；
例句：It comes down to this: the man is a cheat.
事实是这样：那人是个骗子Va%SF,g9)jtp4]ctf。
2. on average 基本上；大体上；
例句：On average, we use only 15 percent of our lung capacity, even during strenuous exercise.
一般情况下，人们即使剧烈运动也只用到15%的肺活量oS]34KBUf)iytTK[.5。
3. cancel out 抵消；
例句：He wonders if the different influences might not cancel each other out.
他在想,各种影响能不能相互抵消G&4,WHXRw4HdInY#Df。
4. fit the bill 适合需要；符合要求；
例句：On paper, several of the applicants fit the bill.
从书面材料看，有几位申请人符合条件l&8[@(-m[^00v。
5. in terms of 在…方面；从…角度看；根据…来说；
例句：They have got all their ducks in a row in terms of how the company should be structured.
在应如何整合公司方面，他们已一切安排妥当w9.%]y=pm)_bGj。
6. screen out 筛选出；
例句：Unsuitable candidates were screened out.
那些不合格的候选人被筛选掉了v6tBY_N*_x,lqm*XdRn9。