| 单词 | half-life |
| 释义 | half-life (once / 91623 pages) n WORD FAMILY half-life USAGE EXAMPLES“I don’t want to settle for a half-life,” she writes. New York Times(Nov 30, 2016) But such painful cuts alone won’t bring the market into balance for what feels to investors like a lifetime—or at least a half-life. Wall Street Journal(Sep 18, 2016) “If you put a drug that has a really long half-life, it is going to last even longer in our elderly.” Washington Post(Aug 15, 2016) n 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) Syn|Hyper half life period, period of time, time period an amount of time |
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