They concocted a sinister plot.

他们策划了一个毒辣的阴谋。

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。

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。

Matt Yglesias even suggested in an article for Slate a few years ago that unlimited vacation is a sinister plot cooked up by the overlords to passive-aggressively force people to work more.

马特·伊格雷西亚斯前几年曾为Slate杂志撰文指出：无限假期就是一项邪恶计划，目的就是为了变相偷偷强迫人们做更多的工作。

Dean revealing plot look, laughter sinister.

院长透露的情节看，笑声阴险。