评论
打印
重点讲解：
1. so far 迄今为止；到目前为止；
So far we haven't been able to find anything, but we're still researching.
目前我们还没有任何发现，但是我们仍在研究。
2. take sth. seriously 认真对待；
We take threats of this kind very seriously.
我们对这类威胁非常重视。
3. serve as 担任（职务）；
She was elected to serve as secretary of the local party.
她当选为地方党组织的书记。
4. at the expense of 以…为代价；
They are worth having but not at the expense of better services.
它们值得拥有，但是不能因此放弃更好的服务。
