Polyfluoride
多氟化物
🗣️ 情景例句
The train is just up the street.
地铁车就在街的那一头。
Just a second. I'll have to check.
等一等。我得查一查。
Though the doctors did his best, the patient's recovery was slow.
尽管医生竭力医治，但病人恢复缓慢。