重点讲解：
1. refer to
指的是；
eg. It can also refer to a conflict or disagreement, often involving violence.
这个词还可指冲突或不和，常涉及暴力行动5JW*BEORE6&a(。
eg. Twin deficits refer to budget deficit and trade deficit.
双赤字指预算赤字和外贸赤字|6-ZO4b&=5。
2. as well as
除…之外；也；还；
eg. You must deposit 500 as well as the first month's rent.
你必须付500英镑押金及第一个月的租赁费Mb7J~oMLVt^j-F&55。
eg. The child is lively as well as healthy.
这孩子既健康又活泼cDxo-!C,N)gT*1N;。
3. account for
（数量或比例上）占；
eg. Repeat order account for much of our business.
续订货占了我们生意的很大部分@vIxHga;Ys2Ckq6*ia。
eg. Petrochemicals today account for one fourth of all the chemicals made, in ten years this amount is expected to double.
石油化工产品现在已占所有化学制品的四分之一，十年后预计这个数目还要加倍cq%hli;tl1(0n。