radiusn.半径范围；半径；桡骨；辐射区radius block半径杆块radius nerve桡神经radius gauge半径规,半径量规,半径样板,曲度规radius angle圆心角radius ratio半径比radius fixus固定半径Radius survey半径测量radius curvus桡骨弯曲radius trowel半径镘刀radius planer曲面刨床

1. Police searched all the woods within a six-mile radius/within a radius of six miles.
   警方搜索了在周围六英里以内的树林各处。
2. The police searched all the woods within a six-mile radius.
   警察搜索了在周围六英里以内的树林各处。