at the pool有the和at home ,at school无the的原因

in the pool和at the pool at the pool有the和at home ,at school无the的原因 in the pool at the pool 有什么区别? at the swimming pool和in the swimming pool有何不同 要速度 in the pool和at the pool有什么区别［详细点］ at the pool or in the pool?教科书上都是写的at the pool 两者到底有什么区别 The boy is swimming at the pool.为什么是at the pool?用in the pool 是at the pool还是for the pool还是 to the pool 还是on the pool swimming (at)还是(in) the swimming pool --------- Mike like swimming at the pool? i am swimming at the pool The dog is swimming at the pool ,对at the pool提问 at the library at the mall at school at the pool 和 in the library .我知道有in school .in school =at school .有没有 in the mall 呢,in the pool 有in the library哦.究竟这几个怎么个回事啊.资料又都说全部用at .可是还有in in the next photo 和at the pool 为啥加the? i am swimming at the pool 为什么不是in the pool in the pool&at the pool到底用哪个介词啊?有什么区别啊?THANK YOU!新课标初二英语lesson 1 P5 短文里写的是I'm swimming at the pool.咋回事呢？ i'm swimming at the pool对划线部分提问 There are many ____ (fish) at the pool.