Two men can chop down even a thick, sturdy rosewood tree in an hour. Then it requires teams of 15 or 30 or 50 to pull the logs through the muddy up-and-down of the vine-covered woodland.

砍倒一棵粗壮坚固的紫檀树只需要花费两名男子一个小时的时间，但要将这段原木从满是泥泞藤蔓丛生的起伏林地里拖出来则需要15到30人，有时甚至是50人。

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The recent rain had churned up the waterfall into a muddy whirlpool.

近来的雨水把那条瀑布搅成了泥水漩涡。

《柯林斯英汉双解大词典》

Where 50-kilogram king salmon once fought their way up waterfalls to lay their eggs in gravel beds, there now are only concrete walls holding back still water and deep beds of muddy deposits.

50公斤重的大马哈鱼王曾经奋力爬上瀑布，把卵产在砾石床上，现在只有混凝土墙挡住静止的水和深深的泥床。

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It makes phone calls, it plays Angry Birds, it takes clear pictures that you can muddy up with Instagram.

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The muddy 5km path winds up the valley, crossing over a succession of weathered, rickety bridges that span the headwaters of the River Quindio.

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The Mississippi River rolls its fertile sediment down the spine of the nation from Minnesota to the Gulf of Mexico, picking up the muddy contributions of the Ohio and Missouri along the way and those of countless other tributaries large and small.

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