• Fr

    Fr

    ◎ Fr是什么意思 [医] 钫(87号元素) n a radioactive element of the alkali-metal group discovered as a disintegration product of actinium Fr的用法和例句: 1. He was...my fr he was a friend of mine. 他是我的朋... 他是我的朋友 2. No, no, I've got pl... I've go...

    2025-07-19
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