汉英词典
Chinese-English Dictionary
MEANING OF 河水不犯井水
lit. river water does not interfere with well water (idiom); Do not interfere with one another. / Mind your own business.
比喻互不干犯。
shuǐ bù/bú fàn jǐng
EXAMPLE SENTENCES

相较于哥斯达黎加黄白两种蛱蝶“河水不犯井水”,厄瓜多尔的蛱蝶这种不同的交配倾向最终会导致进化出两种不同的物种。

The difference in mate preference could eventually lead to two distinct species, as in Costa Rica, with yellow and white butterflies that no longer interbreed.