Backjoint
n. 石阶踏步背榫; 留槽待填
🗣️ 情景例句
OK. Thanks. See you later.
好 谢谢。再见。
An idle youth,a needy age.
少壮不努力，老大徒伤悲。
Would you care to answer my question on the warranty?
你可以回答我有关保证的问题吗？