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BNC: 16448 COCA: 20084

the quality that some atoms have of producing a type of energy that can be very harmful to health放射(性)

the energy produced by atoms in this way放射线;辐射线;辐射能

A dangerous amount of radioactivity was released into the environment last month.上个月泄漏了大量的放射线,造成很大危险。

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