空间臂对分离有辅助作用。
对不同空间臂长的接枝结果进行了比较，发现空间臂越长，接枝密度越大，血小板黏附以及变形越少。
From the result we found that the longer the spacer is, the bigger the grafting density and the fewer blood platelet adhesion is.
新的后空翻使空间站的宇航员可以拍摄航天飞机的腹部，超长的机械臂使宇航员可以看到航天飞机以前看不见的部分。
A new back flip maneuver allowed station astronauts to photograph the shuttle's underbelly, and an extra-long robotic arm enabled astronauts see parts of the shuttle that were previously out of sight.
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