Drugs pose a major threat to our society.

毒品成为对社会的一大威胁。

《牛津词典》

While air pollution and chemicals are believed to pose a major threat, our analysis determined that tourism served as the silent killer.

虽然空气污染和化学物质被确认为是主要的威胁，但我们的分析认定，旅游业也是一个无声的杀手。

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Tsunamis also pose a significant threat to major infrastructure either already built or planned for coastal areas.

海啸还对沿海地区已经建成或计划建造的主要基础设施构成重大威胁。

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Clinton called the fighting "a terrible law-enforcement problem" in U.S. cities along the Mexican border, but said it does not yet pose a major threat to overall U.S. security.

CNN: U.S. shares blame for Mexico drug violence, Clinton says

And he probably wondered at the identity of Lincoln's guests and gauged whether Major Rathbone looked like the type who could pose a threat to his plans.

NPR: Excerpt: 'Manhunt'