They repudiated all accusations fo unlawful activity .

他们否定了有关他们 非法 行为的所有指挥。

The business is a cover for unlawful activity .

以经商为幌子从事 非法 活动。

This is only the cover for their unlawful activity .

这仅仅是他们 非法 活动的掩护而已。

Pledging to monitor oil and gas markets for potential violations of criminal or civil laws to safeguard against unlawful consumer harm the DoJ has sought to uncover unlawful activity in the energy market though it has shied away from explaining exactly how .

美国司法部确实承诺将“监控油气市场，发现可能存在的刑事或民事犯罪 行为，防止消费者权益受到 非法侵害”，但它一直避而不谈具体做法。