粒子是从天然放射性蜕变得到的带正电的氦核。
Alpha particles are positively charged helium nuclei obtained from natural radioactive decay.
物质蜕变的量无法测量，仅能靠放射性研究引导出这些结论。
The amount of matter transformed cannot be weighed and the study of radiation alone has led to these conclusions.
放射性元素的自发性蜕变被发现后，路德·福特勋爵首先在人工蜕变研究方面取得了成就。
After the discovery of the spontaneous transmutations of radio-elements, the achievement of the first artificial transmutations is due to Lord Rutherford.
放射性元素的自发性蜕变被发现后，路德·福特勋爵首先在人工蜕变研究方面取得了成就。
After the discovery of the spontaneous transmutations of radio-elements, the achievement of the first artificial transmutations is due to Lord Rutherford.
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