1.up to 多达
例句:I can take up to four people in my car.
我的车能载4个人 。
2.arms sale 武器销售
例句:I think the senator will packwood on the arms sale.
我认为这位参议员会改变对武器销售案的立场 。
3.national defense 国防
例句:He has been stepped up to the Ministry of National Defense.
他已被提升,到国防部去工作了 。
4.coalition operation 有助于
例句:Various factors contributed to his downfall.
多种因素的作用导致了他的倒台 。