APP They are synonymous prepositions when they take an object that names something which is the subject of talk,thought,or interest.这几个词当引进某种行为或某种事物的关系,组成介词结构时是同义词,都作关于、对于讲。About is usually interchangeable with any of the other......（本文共 1581 字） [阅读本文] >>