Bineutron
雙中子
??? 情景例句
I continued to teach piano lessons at home.
我繼續在家教鋼琴。
Modesty is not only and ornament, but also a guard to virtue.
謙遜不僅可增添光彩也可以維護美德。
The English and Maths papers weren't easy enough for me.
英語和數學試題對我來說不很容易。