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Other radioactive elements have been discovered since: actinium, radiothorium and mesothorium, ionium, etc.

自那以的其他放元素有:钍和新针、,等等。

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bigeye, bigeyed, bigfet, bigfoot, bigg, bigger, biggest, biggety, biggie, biggin,

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3G, 401(K), a,

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Science Magazine Podcast

But if all the actinium drugs that are being developed succeed, they're going to need millions of doses, right?

但如果所有正在研发的系药物都成功了,将需要数百

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Science Magazine Podcast

They do this year round and all their work, all their effort produces less than a grain of sand of actinium every year.

年都在进行这项工作,所有的努力加起来,每年也只能生产不到一粒沙子大小的锕。

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bight, bigit, biglandulous, big-league, bigleaguer, biglutarate, bigmouth, bigmouthed, bigname, big-name,

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3G, 401(K), a,
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