half life

英美

释义
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- n. 半衰期(半衰变周期；半排出期)
英英释义
Noun:

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)
例句
近反义词
【近义词】

half-life 半衰期
临近单词

halflap half half peak breadth half-bright nut half wave doubler half-carry flag half flux quantum half-day school half-sine pulse half tone reading half-word table half-value dose

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