Quebec remained a backwater until the 1960s.魁北克直到20世纪60年代还是一片死气沉沉。It is a commonplace to say that Northern Ireland is a backwater in the modern Europe.说北爱尔兰是现代欧洲死气沉沉的落后地区已是陈词滥调了。I find this town too much of a backwater.我...
Department of Otorhinolaryngology, Head and Neck Surgery, University Hospital of Zurich, Switzerland.部耳鼻咽喉头颈外科, 苏黎世大学医院, 瑞士.Xiao Liu's mother is a director of the Ophthalmology , and Otorhinolaryngology departement ...
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: ...