It 's very dangerous to be exposed to these viruses without any protection.
不加任何保护，直接暴露在这些病毒下是十分危险的。
And if you follow the news , it ' s a very dangerous period of time there.
如果你跟踪时事的话，就会知道那个地区正处于非常危险的阶段。
It 's very dangerous to throw stones to the cars on the expressway.
对高速公路上的车扔石块是很危险的。
It 's very dangerous to throw stones to the cars on the expressway.
对高速公路上的车扔石块是很危险的。
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