胶片距离 Object-film distance ; object image-receptor distance ; Source-film distance
射线源-胶片距离 Source-film distance ; film distance
被检体-胶片距离 Object-film distance ; film distance
工件至胶片距离 object-to-film distance
物体到胶片距离 object-to-film distance
镜片距离的意思 distance between lenses
焦点-胶片距离 focus-to-film distance
源与胶片距离 source to film distance
物体-胶片距离 Object-film distance
射线源胶片距离 film distance
改变源片距离和曝光剂量，进一步突出所能发现的误差，确定最佳曝光条件；
Then, exposure conditions including the exposure dose and source to film distance were changed to find the optimal one.
夏天还在继续。他们把羊群赶到了一片新的草地上，同时转移了营地；羊群和营地的距离更大了，晚上骑马回营地所用的时间也更长了。
The summer went on and they moved the herd to new pasture, shifted the camp; the distance between the sheep and the new camp was greater and the night ride longer.
当时，距离地球约236000英里（380000公里），图片显示了地球的另一半，从伊斯坦布尔到开普敦及其以东地区，笼罩在一片夜色之中。
Shot from a distance of about 236, 000 miles (380, 000 kilometers), this image shows half of Earth, from Istanbul to Cape Town and areas east, shrouded in night.
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