The half-life of francium is 22 minutes . 钫的半衰期是22分钟。
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On the literary value of qian tang zhi zhai 略论张钫千唐志斋的文献价值
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Welcome to visit wimmy and sandra ' s album ! you can see all our family , friends , our life and so on through those pictures . enjoy them ! 欢迎参观呆仔钫的相簿,这里集结许多发生在我们周围的故事、生活片段,还有陪伴我们成长的家人、朋友们,说不定你也可以在里头找到自己的身影唷!