英语词汇francium怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

单词	francium
释义	francium 英/ ?fr?nsi?m / 美/ ?fr?nsi?m / 简明释义 n.元素钫网络释义 1 [化学]?钫钫钫（Francium）（台湾称鍅，旧译作鉣、錺）是一种化学元素，它的化学符号是Fr，它的原子序数是87，带有放射性。短语 1 francium oxide 无化氧化钫 2 francium isotope 核钫同位素 3 Fr Francium 钫双语例句 1 Francium is the densest of the Alkali Metals and also radioactive. 钫是碱金属中密度最大的，具有放射性。 2 Even Francium's most stable isotope, Francium-223 only has a half-life of 22 minutes. 钫的最稳定的同位素，钫- 223也只有22分钟的半衰期。 3 Because Francium is mainly only found synthetically in laboratory research, it has no known use outside of the laboratory. 由于钫主要仅在实验室研究中产生，它在实验室外没有已知的用途。词源 1 francium:钫来自法国上世纪核物理学家Marguerite Catherine Perey以其祖国命名的化学元素。
随便看	least-square method least square method least square method (lsm) least square minimization least square multiple regression least square normal equation least square parameter estimate least square plane least square polynomial fit least square prediction least square prediction function least square principle least square procedure least-square reduction least square regression least square regression method least square residual least square residual least-squares least squares least square(s) least squares adjustment least squares algorithm least squares algothm least-squares analysis

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