人类的这种正常反应是用来保护自身的，这种反应向我们发出危险信号，让我们做好应对危险的准备。

This normal human reaction is used to protect us by signaling danger and preparing us to deal with it.

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专家认为，约50%的明火是危险的，因为烟囱不能正常运作，有太多烟雾会留在室内。

Experts think that about 50 percent of open fires are dangerous because chimneys don't work properly and too much smoke stays in the house.

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“没有用户数据处于危险中，我们很快为绝大多数用户恢复了正常访问，”该公司说道。

"No user data was at risk, and we have restored full access to the site for most users," the company said.

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