But some things are personal or private, and questions about them are not polite.
但是有些事是私人的,问这些方面的问题是不礼貌的。
I'm afraid the pollution will kill us all.
公害可能把我们都逼死。
The parquet floors shone like mirrors; highly polished silver was displayed in gleaming glass cabinets; even my uncle's huge collection of books was kept miraculously free from dust.