Physics. A mass of material, usually lead or concrete, intended to absorb neutrons and other ionizing radiation emitted by a reactor or…
| 单词 | θ79688 |
| 释义 | the world > matter > physics > atomic nucleus > nuclear fission > nuclear fuel > [noun] > protective material (3) shield1933 Physics. A mass of material, usually lead or concrete, intended to absorb neutrons and other ionizing radiation emitted by a reactor or… boron1938 Examples in Nuclear Physics. shielding1945 Physics. Material which protects or shields. against radiation (cf. shield, n. 8e). |
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