I work not because I have to, but because I want to.1. because I have to在句中做什么成分?2. but because可以同时出现在句子里吗?并且还是连在一起?
3. because I have to和 because I want to不是完整的句子呀,那它们应该也不是原因状语从句了吧?
The implications of disinfection by-products (DBPs) present in drinking water are of public health concern because of their potential mutagenic, carcinogenic and other toxic effects on humans.张老师:我看文献看到这么一句话,我的理解它大体意思说:我们的日常饮用水都...