Even more than mountainside slides of mud or snow, naturally occurring forest fires promote the survival of aspen trees.

自然发生的森林火灾甚至比山体滑坡或积雪更能促进白杨树的生长。

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The mud disappeared under a blanket of snow.

泥地在一层白雪的覆盖下消失不见了。

《柯林斯英汉双解大词典》

The rubber tracks (3) allow the Viking to travel over soft terrain such as desert, snow or mud because its load is evenly distributed over all four tracks, all of which are driven.

BBC: Factfile: Viking armoured vehicle

Catching sight of a wolf or a bear requires luck and patience, as they are nocturnal, elusive animals, but you may come across their tracks in the snow or the mud.

BBC: Italy��s wilderness, far from the madding crowds

Behind banks of snow along East Tudor Road, Lisa Albecker recently ran her mud-spattered Ford F-150 pickup through an almost empty car wash.

WSJ: Winter Seems Eternal in Anchorage, Alaska