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首页英语词典half-lifehalf-life英英释意

half-life

英 ['hɑ:flaif] 美

half-life的意思英英释义实用场景例句

n. [核] 半衰期

英英释意

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)