By measuring changes in the light reflected from the clouds, they found that the clouds appear to wax and wane in prevalence over a 27-day cycle.

通过测量夜光云反射的光的变化，他们发现夜光云从盛到衰的周期大约为27天。

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In another distant age, Icarus was the first human being who can fly in the sky, light and heat of the sun melted the wax on his wings, finally he drowned in the sea.

另一个遥远的时代，伊卡洛斯是第一位飞向天空的人类，但是他双翼上的蜡被太阳的光热融化，最终葬身大海。

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These shoes are pink and black, patent leather reflex the light, polished, like the wax, shiny!

这双鞋子就粉色和黑色的，漆皮反射着光线，锃亮的，像打了蜡一样，闪亮极了！

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Likewise the distinction between light (low wax content) and heavy crudes are important for similar reasons, most refineries cannot process both equally well.

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Light crudes have low wax content, with lower density and API viscosity.

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In 1667, Paris became the first city in the world to light its streets, using wax candles in glass lamps.

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