前者是举例说明 后面一般跟两个到三个例子 没有固定要求 我给你几个词典中的造句你就清楚了
Wild flowers such as orchids and primroses are becoming rare. 兰花和报春花之类的野花越来越少了.
Such a disaster as her car being stolen had never happened before. 有的祸事, 像她的汽车被盗之类, 以前从未发生过.