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。

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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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One vessel entering New York recently was stopped by the coastguard and quarantined for several days outside the port while officials investigated the source of radiation emanating from its hold.

ECONOMIST: In peril on the sea | The

Further, study of the captured space rock could teach researchers how to efficiently extract water from asteroids a resource that could be an off-Earth source of radiation shielding and rocket fuel for journeying spacecraft.

MSN: NASA might lasso an asteroid and drag it to orbit near moon

The device's primary source of neutron radiation was the radioactive element californium, but the stream of neutrons produced by the californium was multiplied by passing it through a lattice of highly enriched uranium U-235, whose nuclear fission released additional neutrons.

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