radii

• Let us draw the circle with center at o and radius equal to a .
  我们以点O为圆心，以a为半径，作圆。
• Roundness depends on the sharpness or radius of curvature of the edges .
  浑圆度取决于边角的锐度或曲率半径。
• For a given radius no one angle is correct for all speeds .
  对于给定的曲率半径，没有一个适合所有速度的角度。
• It is now necessary to introduce a sign convention for radii of curvature .
  现在必须介绍曲率半径的正负号规则。
• Step edges that are parallel to the planet radius are coated symmetrically .
  与行星径向平行的台阶边缘被对称淀积。
• Hence, the damage radii can not be determined from overpressure alone .
  因此，破坏半径不能单单由超压力大小来决定。
• The shock from the explosion crushed the rock to a radius of 130 feet .
  爆炸形成的冲击波把130英尺半径内的岩石捣碎。
• The particle radius unit, the micron, is especially common and useful .
  粒子半径的单位是微米，微米这个单位尤其普通和有用。
• His axiom presupposes that there is an arbitrarily large radius at our disposal .
  他的公理就是先假定有如我们意愿的任意大半径。
• The radii of the rings are determined by the spacing of the gravity observation points .
  圆的半径为重大观测点之间的距离所决定。