It falls as rain.

它以雨的形式落下。

youdao

From what I remember, water changes back and forth from water in lakes and oceans to vapor, and then back to water again when it falls as rain or snow, as precipitation.

根据我的记忆，水往复地变化，从湖泊和海洋里的水变成水蒸气，然后当它以雨或雪——也就是降水的形式落下时又变成水。

youdao

youdao

Rain falls on the metal roofs and flows into aluminum gutters.

VOA: special.2009.07.27

Take, for example, "The rain in Spain falls mainly on the plain."

看，西班牙之雨大多洒落于平原之上“

耶鲁公开课 - 文学理论导论课程节选

What's important in My Fair Lady is to - repeat the repetitiousness of verse-- the rain in spain falls mainly on the plain -in terms of the tautology of the plot.

重要的是窈窕淑女中,这种韵律的加强-,“西班牙之雨大多洒落于平原之上“,韵律的反复加强了情节。

耶鲁公开课 - 文学理论导论课程节选

When it rains, a column of rain falls and the water drains away into holes in the floor.

BBC: A perfect day in Rome

Springwater is trapped by the terraces, and then evaporates, forms clouds and falls again as rain higher up the mountain.

BBC: The perfect trip: China

Rain falls free, but someone has to spend money and deploy skills in getting it to the tap, and removing it in a sewer.

ECONOMIST: Third-world water and the private sector