Pentone
缬烯炔, 异戊烯炔
🗣️ 情景例句
There's a shortcut--if you know it.
假如你识路的话, 有一条近路可走。
All our work was in vain.
我们白干了一场。
They intend to bring the men up in a special capsule.
他们准备用一种特制的容器把这6个人救上来。