旋 转尺能当作一个简易圆规使用，能根据需要画弧、画圆，同时能 确定两物体的位置与方向。
The rotary ruler can be used as simple compasses, can be used to draw arcs and circles according to demands, and can be used to define positions and directions of two articles simultaneously.
一英尺高的红色机器人群快速地沿着主要走廊移动着，它们靠着下面的三轮转脚移动，就像一群大型昆虫。
Zipping down the main hallway, the foot-long (0.3 meter) red robots pivoted this way and that on their three wheels, resembling nothing so much as large insects.
干预：伴或不伴尺神经转位术的手术修复股骨远端骨折。
Intervention: Surgical repair of a distal humerus fracture with or without ulnar nerve transposition.
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