Canthiumine
鱼骨木碱
🗣️ 情景例句
Don't worry about it. It's nothing.
别担心，没事儿。
You cannot have two forenoons in the same day.
一日之中不可能有两个上午。
This is because they had no natural enemies until the arrival of humans and therefore did not need to develop flying wings.
这是因为人类到达这里之前，这些鸟没有天敌，因此，它们不需要发育飞行的翅膀。