单词	concretion--concrement
释义	concretion，concrement结石
随便看	transition network，tn transition nucleus transition of circulation types transition of higher order transition of spontaneous emission transition of the first order transition of the second order transition of venus transition-- onceforbidden transition operator transition options transition order transition part transition period transition-period transition period decay transition phase transition phenomenon transition piece transition plan transition planning and support transition point transition probabilities transition probability transition--probability