英语词汇half-life的意思、用法及释义-英汉双解词典

单词	half-life
释义	half-life n time taken for the radioactivity of a substanceto fall to half its original value 半衰期（某物质的放射性元素由原有量衰减到一半所需的时间）.
随便看	lawmaker lawn lawn-mower lawn tennis lawsuit lawyer lax laxative laxity laxly lay layabout layaway lay-by layer layer cake layette lay figure lay into sb/sth layman lay-off lay off (sb) layout lay over lay-over

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