The boys will get tired of Ann's blowing hot and cold.男孩子们对于安的出尔反尔感到厌烦.Mary Ann shot him a rueful look.玛丽·安懊悔地瞥了他一眼。Ann : It is always the dryasdust datum and numbers every day.每天都是枯燥无味的数字和数据.Ann Shapland looked puz...
比色法涉及氟离子对预先形成的颜色的消色作用.The colorimetric methods involve the bleaching of a preformed color by the fluoride ion.用香草醛-冰醋酸比色法测定西洋参中总皂甙的含量.The content of ginsenoside in Panax quinquefolium L was determined by colorimetry.方法: ...