radius的意思如下:
n.（圓或球的）半徑；半徑（長度）；半徑（距離）；（多邊形的）半徑；（人的）橈骨；（脊椎動物的）橈骨；（昆蟲的）徑脈。comp.半徑的。
（菊科植物，如雛菊的）邊花群，舌狀花群；（車輪的）輻條，輪輻；（偏心輪的）偏心距，偏心度；（用半徑度量的）圓形面積，方圓；（船只、飛機等的）有效航程，活動半徑。
雙語例句:
1. Nigel has searched for work in a ten-mile radius around his home.
奈傑爾壹直在他家周圍10英裏的範圍內找工作。
2. He indicated a semicircle with a radius of about thirty miles.
他標示出了壹個半徑大約為30英裏的半圓形。
3. the radius of a curve.
曲線的半徑。
4. Pending tests, thousands more chickens within a 16-kilometre radius of the infected farm were quarantined.
待檢期間，那家受汙染的農場周圍16公裏的區域內又有數千只雞被隔離。