They concocted a sinister plot.

他们策划了一个毒辣的阴谋。

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Believed to have been washed away during the storm, he has not been heard from since, but the signs point to a more sinister plot.

他没有音讯，应该是在暴风雨中冲走，但迹象表明一个更加邪恶的阴谋。

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Its articles - whether about the sinister plot behind the fluoridation of water supplies or about the sun's cancer-curing properties - are widely Shared on social media.

它发布的文章——无论是关于供水氟化背后的阴谋或者大肆宣扬太阳的治癌特性——被广泛地转载于社交媒体。

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Conspiracy theorists - of whom there are many in the Arab world - see the workings of a sinister plot to discredit the Iraqi resistance - a view you can also hear inside Iraq.

BBC: NEWS | Middle East | Arab reaction to Hassan 'killing'