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[计] DOS内部命令
🗣️ 情景例句
Okay. Thank you.
好的，谢谢。
On a crowded train, one comes in contact with many people.
在拥挤的火车里面，会和许多人接触。
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。