One thing that a traveler to anther country notices 中that引导什么从句
问题描述：
One thing that a traveler to anther country notices 中that引导什么从句
one thing that a traveie to another country notices is that the rules for saving hello are very complicated这句中两个that各引导什么从句,其中第几个that可省
答
that a traveie to another country notices 定语从句,that可以省略.
that the rules for saving hello are very complicated表语从句,正式英语中一般不省略.