Cauce
河床
🗣️ 情景例句
What are your terms?
你的条件是什么？
This airline has a good safety record.
这家航空公司有很好的飞行安全记录。
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。