Protiums
n. [核] 氕（氢的同位元素）
🗣️ 情景例句
A young male may be addressed as 'young man'.
一个年轻的男性可以被称作 'young man' 。
Mac always has to run to catch his train.
麦克常常为了赶乘火车而奔跑。
They look around ,but Li Mei did not wait for their thanks.
他们看看周围--但刘梅没有等他们感谢就走了。