有约在先 [
yǒu yuē zài xiān]
have a previous engagement
as promised before
- 对不起,这曲探戈我已有约在先了。
Sorry, I'm engaged for this tango. - 星期一我不能见你,因为我有约在先了。
I cannot see you on Monday because I have a previous engagement. - 可以请你跳支舞吗?对不起,我有约在先了。
May I ask you for a dance? Sorry, I'm engaged.