Hexaldehyde
[医] 己醛
🗣️ 情景例句
Yes, but I don't know where to start.
是的 ，但我不知道从何说起。
Karl must concentrate on his work.
卡尔必须集中精力于自己的工作。
How did the bees know exactly in which diection to fly?
蜜蜂是怎样确切地知道朝哪个方向飞呢？