Backjoint
n. 石阶踏步背榫; 留槽待填
🗣️ 情景例句
I was in the smoking section.
我原本坐在吸烟车厢的。
I still have some questions concerning our contract.
就合同方面我还有些问题要问。
Sorry, I don't know. My watch is at home.
对不起，我不知道，我把表放在家里了。