半衰期 meaning in English
[物理学] half-life period; half-time; half-value period; [核物理] radioactive half-life
Examples
- It has a half-life of about 41/2 billion years .
它的半衰期大约为45亿年。 - The half-life of francium is 22 minutes .
钫的半衰期是22分钟。 - A very useful quantity is the half-time for the reaction .
一个很有用的量是反应的半衰期。 the half life of the uncharged pion is 6×s. 中性兀介子的半衰期为6秒。 - 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。