Before entering the plant, all visitors must be measured for a general background.

在进入核电站之前，所有的参观者必须进行一次背景辐射测定。

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In our background picture today, you see a tree growing in a harsh environment, yet it is a strong, hardy plant.

现在我的背景图片中，你能看见一片荒芜中生长着小树，它顽强的生长。

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It is an interesting fact that background radiation level in the power plant is lower than in the center of Moscow.

有意思的是，电厂里的本底辐射水平低于莫斯科中心的本底辐射水平。

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New figures on background radiation levels recorded 60km northwest of the Daiichi power plant have also been released this week by Japanese physicist Tsuneo Konayashi from Fukushima Medical University.

BBC: Fukushima fallout fears over Japan farms