In the midst of these variations the theme was always ingeniously and excitingly retrieved.这些话题在令人应接不暇地转换着,但总是能得到鼓舞人心的巧妙的补充.It developed variations in nomenclature and in substance.它在名称上和实质上都发生了一些变化.Regular Patterns of V...
然后通过大量实验筛选出两种有效添加剂环丁砜和六次甲基四胺.Following that, two effective additives - syclotersuphone and methenamine are found by series experiments.盐酸雷尼替丁与7, 7, 8, 8-四氰基对二次甲基苯醌荷移反应的研究.Study on the Charge - Transfer Reaction of Raniti...