Charmonium
[单复同]n.[核](被认为由一对粲夸克-反夸克构成的)粲素
🗣️ 情景例句
Is room service available?
有房间服务吗？
Take the world as it is.
随遇而安。
I'll have to check with our engineers.
我得请教工程师才行。