Plumbane
烃基铅
🗣️ 情景例句
if you're not going to be happy about it.
假如你会因为这种事而不快乐的话。
Don't be afraid he will get there on time.
不要怕他会准时到那里。
Everybody will be watching anxiously as the new buildings go up.
大家都将急切地注视着新建筑的建成。