为什么有think it over 而不能有think it about ?

为什么有think it over 而不能有think it about ? it think over think about 的区 是think it over 还是 think over it ? 为什么? think it over录音 ________(think)it over. think it over是什么意思 Think it over,please. think about it还是think it about Think it over ,I think it's please before doing it A;think over it B;think it about C;th Think about It 歌词 think about,think of,think over,think out有什么区别,有什么联系呢?