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radioactive substance
met. 放射性物质
radioactive substance Any substance that contains one or more radionuclides of which the activity or the concentration cannot be disregarded as far as radiation protection is concerned
environ. 放射性物质 (包含一到多种放射性核素的物质。这种放射性核素的活性和浓度是辐射保护时要注意的。)
radioactive substance
: 2 phrases in 1 subject
Technology2

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