A certain scientist had discovered that a metal called uranium gave off a kind of radiation, which Marie Curie was later to call radioactivity.
有一位科学家曾经发现了一种叫做铀的金属具有辐射性，后来玛丽·居里夫人把这种现象称作放射性。
A certain scientist had discovered that a metal called uranium gave off a kind of radiation, which Marie Curie was later to call radioactivity.
有一位科学家曾经发现了一种叫做铀的金属具有辐射性，后来玛丽·居里夫人把这种现象称作放射性。
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