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Francium is the densest of the Alkali Metals and also radioactive.

碱金属中密度大的,具有放射

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britzka, briviskop, Brix, Brix Scale, briza, brize, BRL, BRL-14, BRL-1400, BRLESC,

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3G, 401(K), a,

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A lump of Plutonium, which is very radioactive, is really quite warm to touch. And francium, which I think is more radioactive, is probably very warm.

射性很强的钚,起来真的很暖射性更强的可能非常暖

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broad bean, broad caster, broad gauge, broad hatchet, broad jump, broad way, broadax, broadband, broadbanding, broad-based,

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3G, 401(K), a,
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