half-life
音标发音
- 英式音标 [ˈhɑːf.laɪf]
- 美式音标 [ˈhæf.laɪf]
- 英式发音
- 美式发音
基本解释
- n.半衰期
英汉例句
- The time it takes for half of its original amount to decay is called the half-life.
衰变至只剩下原来数目一半所需的时间称为该核素的半衰期。 - It is not necessary to wait until half of a sample has decayed in order to measure the halflife.
不必一直等到样品衰变一半之后才测量它的半衰期。
用作名词 (n.)
英英字典
- the length of time needed for the radioactivity of a radioactive substance to be reduced by half