A value of a physical property that is half an earlier value; used esp. attrib., as half-value period = half-life, n. 2; half-value thickness (see…
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| 单词 | θ98068 |
| 释义 | the world > space > extension in space > measurable spatial extent > thickness > [noun] > thickness of material that halves radiation (1) half-value thickness1938 A value of a physical property that is half an earlier value; used esp. attrib., as half-value period = half-life, n. 2; half-value thickness (see… |
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