radius[ˈreidjəs]

n.半径，有效航程，范围，界限
‖ radius drill定距射门练习
radius of action滑降弯转半径
radius of burst爆炸半径
radius of damage破坏半径
radius of flight飞行半径
radius of gyration回转半径
radius of influence影响半径
radius of operation活动半径
radius of rotation转动半径
radius of safety安全半径
radius of visibility能见半径