场的漂移运动可以作一般性推广：自然界中在外力作用下任意涡旋场可以产生场的漂移运动。
The drift move of field has generality: Any eddy field may have a drift move of field in the nature when the external force acts.
在漂移区中考虑直流空间电荷场的影响。我们发现电子运动在该区服从一振荡方程；
We find out that, in drift, region, the motion equation of electron is an oscillation one, which influences the prcbunching of electrons.
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