the time required for half of the atoms of a radioactive substance to become disintegrated
the time required for the concentration of a drug or other substance in an organism to be reduced to half by natural processes
| 单词 | half-life |
| 释义 | half-lifenounthe time required for half of the atoms of a radioactive substance to become disintegrated the time required for the concentration of a drug or other substance in an organism to be reduced to half by natural processes |
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