Tetraethide
四乙基金属
🗣️ 情景例句
Never know what?
说不定什么？
The basketball championship is exciting.
那次篮球冠军赛真激动人心。
Why does aperson standing in a bus or train tend to fall when a sudden start is made?
一个人站在公共汽车或火车上，当车突然开动时，他为什么会倾倒呢？