| 释义 |
ra·di·o·ac·tiv·i·ty AHD[rā'dē-ō-ăk-tĭvʹĭ-tē] D.J.[ˌreɪdiːəʊækˈtɪvɪtiː]K.K.[ˌredioækˈtɪvɪti]n.（名词）- Spontaneous emission of radiation, either directly from unstable atomic nuclei or as a consequence of a nuclear reaction.自动放射：自动地发出辐射，直接源于不稳定的原子核或是作为核反应的结果
- The radiation, including alpha particles, nucleons, electrons, and gamma rays, emitted by a radioactive substance.辐射：由一种放射性物质发出的辐射，包括α粒子、原子核、电子、和γ射线
|