让人担心的是，这些力量如今已经出现，而且看来正在不断增强。

Worryingly, these have now emerged and appear to be gaining in strength.

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然而，存在另外一个更为让人担心的可能。艾肯·格林是这样描述的。

But there's another, more worrisome possibility. Eichengreen describes it like this.

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让人担心的是这家公司可能会为了保证现金流动性，而被迫低价出售其重要资产。

The fear was that the company would have to sell off a major part of its asset base to stay liquid.

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But one thing I've heard, a report I read recently that disturbes me is that the overwhelming majority of the officers are Tadzhiks.

但是我还听到一件事，我看到一篇报道说到,让我有些担心,绝大多数的官员是塔吉克斯坦人。

普林斯顿公开课 - 国际座谈会课程节选

This was of great concern because the number of polio cases shouldn't go up as the vaccine is being even more actively distributed through the country, so what happened?

这个现象让人担心,因为小儿麻痹症的发生数量,不应该在疫苗全国范围内普及后,反而有所上升,那么到底发生了什么

耶鲁公开课 - 生物医学工程探索课程节选