We found them by accident. We stumbled upon this molecule from red wine, and when I looked on the computer - what is this resveratrol?

我们偶然找到了它们。我对此分子来自红酒感到惊讶，当我看着计算机时，这个白藜芦醇是什么？

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The mallard nest that we had stumbled upon that spring day along the wooded shore of my father's backyard pond was abandoned and strewn apart. only five of twelve eggs were left unbroken.

春季的一天，沿着我父亲后院长满树木的池塘岸边，我们碰巧发现一个被遗弃的散落的绿头鸭窝，12个蛋中只剩下5个还没有破壳。

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In our reporting, we stumbled upon a scene from the DDT film on an obscure Web page.

CNN: A toxic history lesson

You've previously seen the C900 from Clarity, and tonight we stumbled upon its second generation of handsets for senior citizens known as the Pal.

ENGADGET: Clarity Pal hands-on, a new phone for senior citizens

As it happened, we stumbled upon a mysterious product known as the Air DAC, and happily, NuForce CEO, Jason Lim was on hand to give us a tour.

ENGADGET: NuForce CEO teases Air DAC for high quality wireless audio streaming at CES (video)