The original sentence should be, if two kinds of feelings last for a long time, sooner or later.

Queqiao Xianxian Qiao Yun

Song dynasty: Qin Guan

The thin clouds in the sky are changing, the meteors in the sky convey the sadness of acacia, and the endless galaxy I quietly crossed tonight. When Goldwind meets Yulu, it wins, but there are countless people in the world.

Translation:

Thin clouds are changing in the sky, meteors are conveying the sadness of acacia in the sky, and I quietly crossed the distant and boundless galaxy tonight. Tanabata meeting in the autumn wind and white dew is better than those couples who are together in the world.

Common complaint against acacia, tender feelings like water, meet each other as if it were a dream, when it is hard to see the bridge. As long as two people love us to the end, why covet my Heron?

Translation:

Acacia, tender as water, meet each other as if it were a dream, and can't bear to see Queqiao Road when leaving. As long as two people love each other till death do us part, why do you want to be very much in love?

References:

1, hengtang delisting, etc.

There are 300 Tang poems, 300 Song poems and 300 Yuan songs.

Beijing: China Press, 2009, 1 1 Edition: p. 220.