Her husband doesn't think she should continue working after the baby is born.
她的丈夫认为女人生了孩子就不应该再继续出去工作了。
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。