A surprising number of ailments are caused by unsuspected environmental factors.

惊人数量的慢性病是由未知的环境因素引起的。

《柯林斯英汉双解大词典》

A surprising number of them didn't even have passports.

居然有相当多的人甚至没有护照。

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Unfortunately, there are a surprising number of people who don't get it.

不幸的是，很多人不明白这个道理。

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But there are also a surprising number of areas of empty land where houses used to stand.

VOA: special.2010.01.22

Taipei also offers a surprising number of pleasant spots to walk off all that good food.

CNN: ASIANOW - TIME Asia | Travel Watch

I've met a surprising number of voters who say they can't make up their minds.

BBC: Why Bloomberg's endorsement matters

But Mr Friedman appears to take himself seriously, and so do a surprising number of Texans.

ECONOMIST: A joke-spinning candidate with serious consequences