Serolysin
血清溶素
🗣️ 情景例句
You won't forget, will you?
不会忘记吧？
Could you carry my doggie for me?
你能替我带我的小狗吗？
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。