Hesitance
出国 Abroadn. 踌躇, 犹豫
✅ 同义词
🗣️ 情景例句
But it is not polite to ask older people their age.
但问老人的年龄是不礼貌的。
If he doesn't, will you eat some?
如果他不，你会吃一些吗？
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。