Yet scientists were puzzled at what the food source would be for these critters.

然而，科学家们十分困惑，这些生物的食物来源又是什么呢。

youdao

I was more puzzled when I got there - Mr. Wu insisted that I be seated in the most prominent spot, and placed himself and all his associates at the table in lesser positions.

等到了那儿，我更困惑了——吴先生坚持让我坐在最主要的位子上，而把他自己和他所有的同伴安置在较次要的席位。

youdao

Alice tried to fancy to herself what such an extraordinary ways of living would be like, but it puzzled her too much, so she went on: 'but why did they live at the bottom of a well?'

爱丽丝尽量地想象这样特殊的生活方式会是什么样子，可是太费脑子了。于是，她又继续问：“她们为什么要住在井底下呢？”

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You can be puzzled by that or puzzled by why we are ineffectual at rebuilding a moral framework in the age of pervasive communications.

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That is one reason why you might be puzzled that the euro has usually gone down at the worst moments of the crisis - and risen in value when policy makers seem to be pulling together.

BBC: ECB takes (a little) action