搅拌牛奶就得黄油，水到渠成

as the churning of milk produces butter.搅拌牛奶就得黄油 水到渠成；顺理成章；理所当然。

据《圣经·旧约·箴言》（Bible, Old Testament，Proverbs）第30章第33节记载：“激动怒气必起争端，正如搅拌牛奶之得黄油，拧扭鼻子必出鼻血。”

As the churning of milk produces butter, and wringing the nose produces blood, so the forcing of wrath produces strife.

如：

If you make him feel insulted, you’ll get paid off by him, just as the churning of milk produces butter.

（你要是让他觉得受到侮辱，他理所当然要向你报复。）