Backjoint
n. 石阶踏步背榫; 留槽待填
🗣️ 情景例句
she would call us.
她会打电话过来的。
Art is long, but life is short.
人生有限，学问无涯。
There are twenty-four boys, and twenty-two girls.
二十四个男生，二十二个女生。