RE: RE: 也写玩具：我曾经最心爱的玩具
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RE: 也写玩具：我曾经最心爱的玩具

oflyhigh(86)
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好像也差不多吧

火石的主要的成分是铈与镧制成的铈铁合金。
铈与镧是轻稀土的主要成分吧

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