A stone marker set up on a roadside to indicate the distance in miles from a given point. 里程碑，里程标路边所设立的石制标志，以英里指示从给定的一点到该路标的距离
Activity or traffic along a route or through a given point. 游行沿某一条路或通过一点的运动或通行
A time measurement for a given computer word to pass a given point as in serial storage delay-lines. All of the bits of a word must pass through the input control gate; the beat is then the sum of all the bits times. 在串行存储延迟线中，计算机字通过某指定点的一种时间度量。该字的所有位必须通过输入控制门，拍则是所有位时间之和。
Angular distance is the distance between two objects measured as an angle from a given point. 角距离，是由一定点到两物体之间所量度的夹角。
