实际体积(Measured Volume) 和目标体积(Target Volume)的百分比在大多数状况下决定了印刷质量的好坏,虽然这个百分比的范围较为宽阔,由21%至130%,但如何确认并保持又变的尤为重要了。
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如果治疗的区域大于一个单位的治疗区域,就需要用多次照射来覆盖整个治疗区域,在实践中,大多数的目标体积被照射1至15次。
For a target volume larger than one shot, multiple shots can be used to cover the entire target. In practice, most target volumes are treated with 1 to 15 shots.
最初的“捕食者”搭载的是照相机,进而又搭载武器,可在接到命令后即刻对目标进行袭击;后来又有体积更大的无人机被研制出来——“收获者”,可携带更多武器。
The first flying cameras evolved into armed versions that could strike targets at short notice, then into a bigger plane, the Reaper, able to carry more weapons.
通过对望远镜视野之内的156,000个目标恒星的观测,在43天的时间里发现了706个体积介乎地球和略大于木星之间的太阳系外行星。
Of the 156,000 target stars in the telescope's field of vision, the 43 days of observations found 706 possible extrasolar planets from Earth size up to a bit bigger than Jupiter.
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