IIS will not serve up a file that is not present, so your handler will never fire if the update path is invalid.

IIS不能处理未在列表中的文件，所以如果更新路径无效的话你的处理器将永远不会触发。

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To prevent such tragedies, fire fighter Eric Velez gives talks to children in his community, explaining that they should never hide during a fire.

为了防止此类悲剧的发生，消防队员埃里克·维勒兹给社区的孩子们做了演讲，他解释道，火灾发生时，孩子们不应该躲起来。

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He's never going to set the world on fire with his paintings.

他的绘画永远不会引起轰动。

《牛津词典》

There is an important caveat: Never yell fire in a crowded hospital.

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Fey and Rudd have a breezy rapport that never catches fire.

NEWYORKER: Admission

The staves never caught fire.

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