arc

• Arc strikes outside of the welds were avoided .
  焊缝外要避免电弧穿刺。
• The beam will deflect into a circular arc .
  该梁将弯成一个圆弧。
• Arc lamps require a current-limiting ballast .
  弧光灯需要一个限流镇流器。
• The individual arcs cannot be rectified .
  单个弧是不能求长的。
• The pole swung in an arc .
  杆子转了一个弧形。
• A common laboratory source of light is provided by a mercury arc .
  通常的实验室光源选用汞弧灯。
• The indegree of a vertex v in d is the number of arcs with head .
  VD中顶点V的入度是指以V为头的弧的数目。
• If the diameter of the pupil is 6 mm the eye is able to separate 120 seconds of arc .
  如果瞳孔直径为6毫米，人眼可分辨120弧秒。
• The crack between the coped and hole was removed by air arc and then repaired by welding .
  在修割边和钻孔之间的裂纹用气弧消除，然后进行焊补。
• A radian is the angle subtended by an arc of a circle whose length is just equal to the radius .
  一弧度就是长度刚好等于半径的一段圆弧所对的圆心角。