Backjoint
n. 石阶踏步背榫; 留槽待填
🗣️ 情景例句
I just want to see one smile from you.
我就想看你笑一个。
I know the boy whose father is a scentist.
我知道那个男孩的父亲是科学家。
Tricycles are lined up on the floor of the pool seven feet under water.
三轮车并排放在7英尺深的游泳池底上。