讨论了采用不同的电磁多极场作为动态校正器的可能性.推导了圆形校正透镜、偏转校正场和四极、六极校正场引起的附加象差的公式.The possibility of dynamic aberration correction by using electro - magnetic multipole fields is discussed....
I am afraid we are not at liberty to disclose that information.恐怕我们无权透露这一信息。The Puritans became fugitives in quest of liberty.清教徒变成了追求自由的逃亡者。the fight for justice and liberty争取正义和自由的斗争...
Objective To observe the curative effect of ligating esophageal varices under endoscope.目的观察内镜下食管静脉曲张结扎疗效.To observe the change of serum bilirubin in patients with MHD and its clinical significance.目的探讨维持性血液透析(MHD)患者血清胆红...