| 词汇 | half-life |
| 释义 | half-life 1 ENTRIES FOUND: half-life (noun) half-life /ˈhæfˌlaɪf/ Brit /ˈhɑːfˌlaɪf/ noun plural half-lives half-life /ˈhæfˌlaɪf/ Brit /ˈhɑːfˌlaɪf/ noun plural half-lives Learner's definition of HALF-LIFE [count] technical : the time it takes for a radioactive substance to lose half its radioactivity（放射物质的）半衰期 a half-life of 200,000 years20万年的半衰期 — often used figuratively to describe how long something remains useful or popular常用作比喻，指某物的繁荣期或流行期 Slang usually has a short half-life. [=slang usually is popular for only a short time]俚语的流行周期通常很短。 |
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