We want to know whether a given vector field with components P, Q and R can be written as f sub x, f sub y and f sub z for a same function f.
要看向量场,能否写成，其中f是同一个函数。
Fair average quality at the time and place of loading shall be assessed upon the basis of London Corn Trade Associations officials F. A. Q. standard.
装运地装货时的匀称中等质量，以伦敦谷物商业协会官方匀称中等质量为准。
Fair average quality at the time and place of loading shall be assessed upon the basis of London Corn Trade Associations officials F. A. Q. standard.
装运地装货时的匀称中等质量，以伦敦谷物商业协会官方匀称中等质量为准。
应用推荐