单词	periodic law
释义	periodic law noun : a law in chemistry: the elements when arranged in the order of their atomic numbers show a periodic variation of atomic structure and of most of their properties Word History First Known Use 1872, in the meaning defined above Medical Definition periodic law noun : a law in chemistry: the elements when arranged in the order of their atomic numbers show a periodic variation of atomic structure and of most of their properties called also Mendeleev's law
随便看	Hyracina Hyracodon hyracodont hyracoid Hyracoidea hyracoideae hyracoideas hyracoids hyracothere hyracotheria Hyracotherium hyracotheriums hyrax hyraxes Hyrcania hyrcanian hyrcanians hyrst hys hyson hyson skin hysons hyssop hyssop loosestrife hyssop oil

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