Fluorines
(fluorine 的复数) n. 氟\\n[化] 氟
🗣️ 情景例句
When my girlfriend rings me out of the blue, I'm in a good mood for the rest of the day.
我突然接到女朋友的电话，接下来的一整天我的心情都很好。
I was wondering if you'd let me stay with you for a few days.
不知道你能否让我在你这里住几天。
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。