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钕镨合金一种金属混合金属,曾被当作一个元素,是由钕和镨组成的。
A metallic mixture, once considered an element, composed of neodymium and praseodymium.
youdao
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钕镨合金一种金属混合金属,曾被当作一个元素,是由钕和镨组成的。
A metallic mixture, once considered an element, composed of neodymium and praseodymium.
youdao