红位移，又称多普勒红移，其出现是由于一个恒星用极快的速度远离地球(宇宙扩张使行星和恒星间的距离增大)，使其发出的光（波）被拉长，变为红光（波长较阔）。
比较距离与红位移量后，发现越远的星系远离我们的速度越快，结论是宇宙仍在膨胀。
After a comparison of distances and quantities red shifts, he found that the farther a galaxy is, the faster it is traveling away from us. The conclusion was the universe is still expanding.
并以国内大港油田大位移井红9—1为例，说明了钻柱旋转在大位移井中对清除岩屑床的重要作用。
Taking the well Hong 9 1 in Dagang Oil Field for example, the important role of the rotation of drilling string in removing cuttings bed in extended reach well is expounded.
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