half-life
half-life 英 [ˈhæfˌlaɪf, ˈhɑ:f-] 美 [ˈhæfˌlaɪf, ˈhɑf-]
n. [核] 半衰期
名词复数:half-lives
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- n. [核] 半衰期
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1. However, because of their extensive use and long half-life, human exposure remains widespread.
然而,因为其被广泛使用及教长的半衰期,人类经常与其接触。
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2. The danger of nitrogen-16 is an issue only for plant workers and operators because its half-life is only seven seconds.
氮16的危险只针对于核电站工人和机器操作者而存在,因为它的半衰期只有七秒钟。
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3. The city’s challenge, chiefly, is to dispose of cesium-137, a radioactive isotope with a half-life of 30 years.
这座城市面临的最大问题就是处理铯—137,这是一种半衰期为30年的放射性同位素。
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