half life
half life是什么意思、half life怎么读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。
half life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