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	pepper-pot peppery pep pill pepsin pep talk peptic per perambulate perambulation perambulator per annum per capita perceivable perceive per cent percentage percentile perceptibility perceptible perceptibly perception perceptive perceptively perceptiveness perch

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