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单词 Radioactive
释义 放射性的

A substance capable of spontaneously releasing rays of high speed particles. Radioactive substances include radium, uranium and thorium. A radioactive chemical is a chemical that has a specific activity of greater than 75 becquerels per gram. See also Radioactive substance; Radioactive waste; Radioactivity.
可自發地放出高速粒子射線的物質。放射性物質包括鐳、鈾和釷。含放射性的化學制品是有特定活動超過每克75貝克勒爾的化學制品。另見 Radioactive substance; Radioactive waste; Radioactivity。adj.

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更新时间:2025/4/5 0:40:13