1)It never pays to take risks where human saftey is concerne
1)It never pays to take risks where human saftey is concerned. 2)usage is the generally accepted way in which words and phrases are actually used in a language.
1) It never pays to do sth.做某事不值得 where引导地点状语从句 整句意思:在你自身安全得不到保证的地方冒险是不值得的. 2) 主干:usage is the way 用法是一种方式(这种方式由in which引导定从解释) 整句意思:用法就是句子和短语实际在语言中运用的一种普遍被接受的方式.