They dredge the bay for gravel.

他们在挖掘海湾沙砾。

《牛津词典》

It is also planning to dredge a series of access channels for ports, and build a railway that will transport coal from central Colombia to the Caribbean harbour of Santa Marta.

它也正在筹划为港口疏浚一系列入口通道，建设一条从哥伦比亚中部通向圣玛尔塔市加勒比海港的运输煤炭的铁路。

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When we dredge the bottom and bring up the remains of animal and vegetable life we find that they give evidence of not having been disturbed in the least, for hundreds and thousands of years.

从海底里捞起来的动植物的遗迹，能对我们证明：它们在海底里数百年数千年之久，从来没有受到丝毫扰动过。

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But shallow waters were less appealing to humans who wanted to dredge the waterways for shipping channels.

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The Supreme Court last considered this question in 2005, when it decided that a marine dredge in Boston Harbor was a vessel for purposes of determining whether people essential to its function were covered by maritime labor laws.

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"The Welsh boys obviously want to do well here, " said Dredge, trying to explain why the wait for a Wales Open winner goes on.

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