我是英语新手.想了解to这个单词怎么用,又有什么规律,怎么有时候后面加th...答:一:表示相对,针对 be strange (common, new, familiar, peculiar, distinct, sensitive, immune, vulnerable, indispensable) to Air is indispensable to life.Aircrafts are vulnerable to interference caused by radiation.This injection will make you immune to infection.二:表示对比,比较 1:以-...