Material used as a screen against ionizing radiation, esp. during radiotherapy; the efficiency of this, as determined by its nature and…
| 单词 | θ79368 |
| 释义 | the world > matter > physics > atomic nucleus > radioactivity > ionizing radiation > [noun] > protective material (1) screenage1916 Material used as a screen against ionizing radiation, esp. during radiotherapy; the efficiency of this, as determined by its nature and… |
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