Kim Holmen of the Norwegian Polar Institute says some of his equipment could detect a cigarette at 2km.

挪威极地研究所的金·霍尔曼说，他管理的一些设备能够检测到2千米外一支点燃的香烟。

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Kim Holmen of the Norwegian Polar Institute says some of his equipment could detect a cigarette at 2km.

挪威极地研究所的金·霍尔曼说，他管理的一些设备能够检测到2千米外一支点燃的香烟。

youdao