Radioactive constant
[医] 放射性常数
🧩 词语组成解析
🗣️ 情景例句
who really needs to be wearing a tuxedo,
真正需要穿燕尾服的人，
Laugh before breakfast you'll cry before supper.
乐极生悲。
Drinks can be cooled by placing them on ice rather than adding ice to them.
可以把饮料置于冰块之上来冷却，而不是把冰块加进饮料之中。