The brushwood closes behind them, as silently as sand into which a mole has dived.

灌木丛在他们身后合拢，悄无声息，就像鼹鼠钻进沙里一样。

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He had been recruited by the Russians as a mole and trained in Moscow.

他曾经被俄国人招做间谍，在莫斯科受训。

《柯林斯英汉双解大词典》

A mole can dig at a rate of 3.5m per hour.

鼹鼠在一个小时内能挖3.5米深的洞穴。

youdao

About the size of a small dog, echidnas look like a mixture of a porcupine, an anteater,a pig and a mole.

VOA: special.2009.07.07

This is the number of carbons there is in a mole of carbon.

这是碳的数量,这是一摩尔的碳。

麻省理工公开课 - 固态化学导论课程节选

So this is how much charge there is in a mole of electrons.

这就是在一摩尔的电子里,的电荷量。

麻省理工公开课 - 固态化学导论课程节选

"I'm beginning to think he's a mole, " infielder Justin Turner said with a laugh.

WSJ: The Catcher Whose Kudos Can Hurt

Engineering firm Dyson has accused German rival Bosch of placing a mole within its headquarters in Wiltshire.

BBC: Dyson claims rival Bosch placed mole within head office

But now it turns out there was a mole in the private equity industry who triggered the investigation.

FORBES: Whistleblower Fingers Tax Tricks At Private Equity Firms