Valerolactone
戊内酯
🗣️ 情景例句
I don't know.
我不知道。
I'd like to know something about your foreign trade policy.
我非常想了解有关贵国对外贸易的政策。
Now they have had special cages made to protect them from these monsters.
现在他们有了特制的笼子，用来保护他们免受大鱼的侵袭。