Fluorinator
氟化器
🗣️ 情景例句
John proposed marriage to Helen.
绚翰向沦论求婚。
I will try.
我会试试看。
The cave might never have been discovered has not the entrance been spotted by the distinguished French pot-holer, Berger.
若不是法国著名洞穴探险家伯杰由于偶然的机会发现了这个洞口的话，这个洞也许不会为人所知。