Backjoint
n. 石阶踏步背榫; 留槽待填
🗣️ 情景例句
It's important for you to keep a cool head at this moment.
这时候保持头脑冷静是很重要的。
Think much, speak little, and write less.
勤思考，寡发言，少落笔。
Mr Green is from England.
格林先生从英国来。