🗣️ 情景例句
I came home a little while ago.
我也是刚刚到家。
Who laughed a while ago?
刚才谁在笑？
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。