元素周期表periodic table of elements
过碘酸希夫反应periodic acid Schiff reaction,PAS reaction
周期的periodic
【经】 定期转销数periodic write-offs
【化】 元素周期表periodic table of (chemical) ele ments
循环小数circulating decimal【数】;periodic decimal【数】;periodical fraction【数】
周期和循环行为periodic and cyclic behavior
高碘酸periodic acid