Fluorochemical
[机] 氟化物
🗣️ 情景例句
You are a terrific instructor, Jack.
你真是个了不起的教练 Jack。
Could you tell me where is the bus stop?
你能不能告诉我公共汽车站在哪里？
It will take me several hours if I really look at everything.
如果全部参观的话，那得需要好几个小时。