Esser's operation
[医] 埃塞氏手术, 上皮内置法
🧩 词语组成解析
🗣️ 情景例句
Check the hood?
要不要检查一下机件？
Nothing crave, nothing have.
有求才有应。
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。