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| alpha radiation A stream of alpha particles which are ejected from many radioactive substances having a penetrating power of a few cm in air but can be stopped by a thin piece of paper (许多放射性物质发射出的、能穿透几厘米的空气但会被一张薄纸挡住的阿尔法粒子流。) | |||
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阿尔法射线 : 6 phrases in 1 subject |
| Technology | 6 |
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