When the object is optimal resource allocation,that combination of legal methods should be used that most nearly yields the allocation that would exist if there were no external costs resulting from allocating resources through market activity.这句话在我的Evernote里已经好长时间了,每天看到这句话我都不怎么懂,其实问题简单来说就是句子里面的好几个that,不明白都起到什么作用。作者: zhouyugang 时间: 2013-6-13 09:33:24