The instant polar movement has backwardmovement (from east to west).
瞬时极移存在反向运动(由东向西)。
2
Recoil mechanism is the crucial part which controls the backwardmovement of a gun.
驻退机是反后坐装置中控制火炮后坐规律的关键部件。
3
Forward and backwardmovement, meanwhile, was a bit harder to coordinate because of the lag time half way around the globe, Mr. Garriott DE Cayeux says.