第三人称复数:half-lives
名词半衰期
1. 半条命:维尔福软件公司(Valve Software)的第一个游戏产品<<反恐精英:半条命>>(Half Life)在1998年11月发布. 时隔六年后Valve于2004年推出了半条命2 ,取得了巨大的成功. Valve的Steam内容发布平台近年来得到了愈发广泛的应用,
2. 半衰期(放射性物质):hair spring 游丝 | half life 半衰期(放射性物质) | half minute thermometer 半分钟体温计
1. (放射性物质的)半衰期
The half-life of a radioactive substance is the amount of time that it takes to lose half its radioactivity.
noun
1. the time required for something to fall to half its initial value (in particular, the time for half the atoms in a radioactive substance to disintegrate)
Synonym: half life