钴的一种放射性同位素，质子数' 0，具有异常强烈的伽马射线作用，用于放射疗法、冶金和材料测试。
A radioactive isotope of cobalt with mass number '0 and exceptionally intense gamma-ray activity, used in radiotherapy, metallurgy, and materials testing.
质子治疗从根本上说是放射疗法的一种。
Proton therapy is basically a new kind of radiation treatment.
质子治疗从根本上说是放射疗法的一种。直到最近，所有的放射疗法都是采用的X射线。
Proton therapy is basically a new kind of radiation treatment. Until recently, all radiation therapy used X-Rays.
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