half life

单词音标

half life

汉语翻译

【医】 半衰期(放射性物质), 半存留期(化学性物质)

英语解释

名词 half life:

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)

同义词：half-life

例句

He\'s been lucky all his life and has never had to find out how the other half lives.

他享了一辈子的福，从来不知道穷人生活的滋味。