The reaction conditions on oxidation of 2 - methylpyridine to 2 - acid by oxidation of potassium dichromate were studied. 研究了以2-甲基吡啶为原料,以重铬酸钾为氧化剂,利用化学氧化法合成 2- 吡啶甲酸的反应条件.
People shelve the out - of - fashion moral icon and espouse the philosophy of egoism.搁置了人民的时尚图标和拥护道德哲学的利己主义.After a sneak preview of the film they decided to shelve it.该影片在试映后,他们决定把它搁置起来.At this point, the chald cliffs s...
Objective To improve the primary cell culture methods of colorectal adenomas.目的对大肠腺瘤细胞原代培养的方法作进一步的改进.Conditions with the lowest incidence were adrenocortical carcinoma, pheochromocytoma, and pituitary adenomas.其次为肾上腺皮质癌 ...
所有颜色都会褪色——尤其是在阳光直射下。All colour fades— especially under the impact of direct sunlight.接触食物前尤其对洗手不能有半点马虎。Be particularly fastidious about washing your hands before touching food.他不喜欢谈论他自己，尤其是当着他学生的面。He was disinclined to t...