half-life 英 [ˈhæfˌlaɪf, ˈhɑ:f-]   美 [ˈhæfˌlaɪf, ˈhɑf-]

half-life

half-life  英 [ˈhæfˌlaɪf, ˈhɑ:f-] 美 [ˈhæfˌlaɪf, ˈhɑf-]

n. [核] 半衰期 

名词复数:half-lives 

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。
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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  • n. [核] 半衰期
  • 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。

  • 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。

  • 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。

ˈhalf-life / ; NAmE / noun [countable ] 1 ( physics ) the time taken for the radioactivityof a substance to fall to half its original value (放射性物质的)半衰期 2 ( chemistry ) the time taken for the concentration of a reactantto fall to half of its original value in a chemical reaction 半反应期 half-life half-lives ˈhalf-life / ; NAmE /
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