Tectorum
[医]顶生的
🗣️ 情景例句
I'm in hot water with the boss.
我跟老板有麻烦。
Why are you so happy?
你为什么这样快乐？
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。