n.圆规，罗盘( compass的名词复数 )，指南针，圆规，界限
Chinese compasses always point south!
中国的罗盘总是指向南方!
The teacher asked us to buy a pair of compasses.
老师要求我们买圆规.
With straightedge and compasses, divide a segment of a into 2 parts.
用直尺和圆规把线段a分成两部分.
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