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| fission | |||
| nuclear fission The division of an atomic nucleus into parts of comparable mass; usually restricted to heavier nuclei such as isotopes of uranium, plutonium, and thorium | |||
| nuclear fission | |||
| fision nuclear: 14 短语, 5 学科 |
| 核物理 | 6 |
| 物理科学 | 1 |
| 电子产品 | 3 |
| 研究与开发 | 1 |
| 自然科学 | 3 |