The ship's sail cast a shadow on the water.

船帆在水面上投下一片影子。

《牛津词典》

Any water molecules that found their way to the floors of craters near the moon's poles, that water would be perpetually frozen, because the floors of those craters are always in shadow.

只要找到了通向月球两极附近陨石坑底部的路，这些水分子就会永远冻结，因为这些陨石坑的底部总是在阴暗处。

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Most scientists believe the likeliest places for water are at the poles of the moon, where there are craters in permanent shadow.

大多数科学家认为，月球的两极是最有可能存在水的地方，因为那里是常年处于阴暗之中的陨石坑。

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The company has been working closely with Val Cameron, the island's shadow water regulator and director of environmental health and pollution, to put together the case.

BBC: Guernsey

As growing water scarcity casts a shadow over the economic boom in warmer states, many in the long-scorned northlands are hoping they can finally make their abundance of freshwater a magnet for businesses and jobs that are now going elsewhere.

WSJ: Great Lakes region pins economic hopes on water

Lying in the shadow of the active volcano Mt Tarawera, Rotorua Lakes is an unrivalled natural landscape where water is clean enough to drink, sweet-smelling air comes alive with native birdsong and fern-filled forests are as bright as a bottle of absinthe.

BBC: Lakeside treks in a geothermal land