Backjoint
n. 石阶踏步背榫; 留槽待填
🗣️ 情景例句
Michelle and her friends are at the aquarium in Brooklyn.
Michelle和她的朋友们在参观 Brooklyn的水族馆。
I was born on September 1st, 1976.
我出生在1976年9月1日。
I can wait, but my toothache can't!
我倒是可以等。可是我的牙痛等不了啊！