Icad
智能计算机辅助设计
🗣️ 情景例句
No. The sssss...
不 ，是sssss……
That's a misunderstanding .
那是个误会。
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。