Pentylene
戊二 烯
🗣️ 情景例句
Littering is a serious offense in some countries.
乱扔垃圾在某些国家是严重的违法。
It is hard to please all parties.
取悦各方，谈何容易。
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。