CR
noun [ U ] uk/ˌsiːˈɑː/ us/ˌsiːˈɑːr/
(CHEMICAL)
chemistry specialized肌酐，肌酸酐（creatinine的缩写）
abbreviation for creatinine: a chemical waste product whose level in the blood is a measure of how well the kidneys are working
CR level 肌酐水平