Fluorocarbon
[建] 碳氟化合物
🗣️ 情景例句
Yes. Those are excellent gifts. Who else do you need to buy for?
当然，这是都是最佳礼物。你还需要买给谁？
Take one's courage in both hands.
勇往直前，敢作敢为。
The old woman thought he was a queue jumper.
老太太以为他是不按次序排队的人。