Fluorochemical
[機] 氟化物
??? 情景例句
You are a terrific instructor, Jack.
你真是個了不起的教練 Jack。
Could you tell me where is the bus stop?
你能不能告訴我公共汽車站在哪里？
It will take me several hours if I really look at everything.
如果全部參觀的話，那得需要好幾個小時。