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词汇
radioactivity
释义
radioactivity
/reɪdɪəʊækˈtɪvɪtɪ/
n.
放射性,放射能;放射现象
We have to learn to control radioactivity.
我们必须学会控制放射能。
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更新时间:2024/6/29 10:31:49