Hexafluoride
n. 六氟化物
🗣️ 情景例句
why don't you introduce everybody to Susan?
何不将她们每一位介绍给 Susan？
He that climbs high falls heavily.
爬得高，跌得重。
Oh dear! You're right.It's closed.
哎吆！你说得对，是关着的。