For human beings, natural radiation is the main source of radiation. It is much more than the radiation exposure from all nuclear facilities for peaceful purposes.
天然辐射是人类所受辐射照射的主要来源，远大于用于和平目的所有核设施带给全世界人口的辐射照射量。
The printer comprises a print head for printing the ink onto a substrate, a heating means for heating the ink on the substrate, and a source of radiation for curing the heated ink.
所述印刷机包括：用于在承印物上印刷油墨的印刷头、用于加热所述承印 物上油墨的加热装置和用于固化所述受热油墨的辐射源。
The printer comprises a print head for printing the ink onto a substrate, a heating means for heating the ink on the substrate, and a source of radiation for curing the heated ink.
所述印刷机包括：用于在承印物上印刷油墨的印刷头、用于加热所述承印 物上油墨的加热装置和用于固化所述受热油墨的辐射源。
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