pencil compass是什么意思 pencil compass怎么读
pencil compass的用法和样例
- Use your compass to bisect an angle.
用圆规把一个角二等分。 - Trisecting an arbitrary angle with a compass and straightedge was one of the famous ancient Greeks unsolved construction problems.
用直尺和圆规三等分一个任意的角是古希腊著名的构造问题之一。
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