情缘

qíng yuán yǐ duàn

情缘已断。

Their love has come to an end.

tā men de qíng yuán wèi liǎo

他们的情缘未了。

Their love has not run its course.

tā men yǒu guò yī duàn lù shuǐ qíng yuán

他们有过一段露水情缘。

They had a brief flirtation.