Once in, though, the skilled attacker has no difficulty covering tracks.

一旦进入公司，虽然，熟练的攻击者却可以覆盖轨道。

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They advance by covering their own tracks.

他们总是自己找辙前进。

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But then Mr Putin, as befits a former KGB officer, started covering his tracks.

但是那时的普京先生作为一名经验十足的前克格勃官员，他开始掩盖自己的一切行径。

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The army, which stands behind Mr Abhisit, has a long history of covering its tracks.

ECONOMIST: And finding that, in Thailand, they no longer fit together

Artful burglars in Saudi Arabia have adopted an effective method of covering their tracks when raiding expatriate flats.

ECONOMIST: Arabian punishment: Preserving values | The

Facing a new threat of separation, Mrs Gould took off with the children again, this time fleeing to Spain, covering their tracks.

BBC: News | UK | Abduction battles are no child's play