✅ 同义词
🗣️ 情景例句
Do you know that I mean?
知道我的意思吗？
In the world, who knows not to swim goes to the bottom.
处世似游泳，不会即下沉。
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。