Recarburizing
增碳作用
🗣️ 情景例句
Smoking makes your teeth yellow and ugly.
吸烟让你的牙齿变得又黄又丑。
He who hesitates is lost.
举棋不定，坐失良机。
All at once, a rabbit came out of a hole.
突然，一只兔子从一个洞中跑了出来。