通过对无机、有机离子化合物,极性化合物的实际分离分析,讨论了 EIC 柱的制备条件对柱涂层厚度和使用寿命的影响.Based on obtainedpapers, we studied preparing conditions of ( EIC ) column.通过控制步进电机的运动, 来实现对柱塞泵流量的精确控制.Through controlling the step motor moving, the accurate contr...
We are struggling with backwardness.我们在和落后现象做斗争.Those who were in various degree of backwardness lived inland.那些在不同程度上较为落后的人住在内地.The basic cause of Russian backwardness lies in its peasants.俄国落后的根本原因就是农民因素....