Male black widow spiders can sniff out a well-fed female simply by walking on her web, according to researchers.

研究人员称，雄性黑寡妇蜘蛛只需行走在雌性黑寡妇织的网上就能嗅出其是否吃饱。

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In stating the obvious, by leaving the car behind and simply walking or riding a bike you are doing both yourself and the environment good.

很快你就会清楚地看到，不用汽车而是仅仅步行或骑自行车，对你自己和环境都有好处。

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I've met some of my good friends by simply walking around in their neighborhood and having to ask for directions.

我曾在附近只是走来走去，或问路的时候碰到了一些好朋友。

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The first lesson is that you can't convince terrorists to lay down their arms simply by walking away.

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Or simply by walking near his home in the idyllic Black Forest, a short drive from the French border and Strasbourg.

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Detractors will argue that steroids and doping can pose health risks to the athletes involved, but athletes undertake serious health risks by simply walking onto the field or straddling a bike.

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