Water refracts, or bends, the light, separating it into red, orange, yellow, green, blue, and violet

水把光线折射或弯曲，而分离为红、橙、黄、绿、蓝和紫色。

youdao

Their work there was aimed at separating the light, fissile isotope of uranium (useful for making bombs and reactors), from its more abundant, but less useful, heavy cousin.

ECONOMIST: Diamonds

By focusing on the edges separating dark from light areas, the researchers classified their dozen cities into three types.

ECONOMIST: Urban geography