【化】 元素周期表periodic table of (chemical) ele ments
高钾性周期性瘫痪hyperkalemic periodic paralysis
周期性族群大发生periodic outbreak
过碘酸反应PAS reaction; periodic acid Schiff reaction
定期检验periodic inspection
周期性波动periodic fluctuation
受扰周期势场perturbed periodic potential【物】
四接点周期网络periodic network of 4-connected points【晶体】