The angular deviation, as observed from the sun, of a planet from its perihelion.
近点距离，近点角从太阳观察到的行星距近日点的角度偏差
Accurate Distance Setting about Distance Marker of Road
公路地点距离标志中距离的准确设置研究
Focus-to-film distance(f.f.d)
焦点-胶片距离(焦距)
Focal length: The distance between the centre of a lens and its principal focus.
焦距:镜头中心与其主焦点的距离。
coincidence range finder
复合焦点测距仪，叠象测距仪
"apart: at a distance in place, position, or time."
相隔,相距: 在地点,方位或时间上成距离
A line connecting isometric points.
等距线连结等距各点的线
Only a bit out of focus.
只是焦距有点不对。
the same distance apart at every point.
在每个点上距离相等。
the point located farthest from the middle of something.
距离事物中间最远的点。
Bit by bit she closed the gap.
她一点一点地缩短了距离。
The distance to be covered is about 85km, as the crow flies.
比赛起点到终点直线距离为85公里。
The distance between two corresponding points on adjacent screw threads or gear teeth.
螺距两个相对应的点或相邻的螺钉之间的距离
The distance between two corresponding points on a helix.
螺旋的间距螺旋线上两个相应的点之间的距离
Find the Time-point of Distance-signal in the DME System
精密测距系统中距离信号定时点选取方法研究
The logical distance between two nodes.One hop is the distance from one node to an adjacent node.
两个节点间的逻辑距离，即一个跃距为从一个节点到邻近一个节点的距离。
A point equidistant from the vertexes of a regular polygon.
中心点，中枢与一正多边形各角顶点等距的一点
The distance from the origin to the point at which a line, curve, or surface intersects a coordinate axis.
截距从原点到一条直线、曲线或平面上的点的距离，与坐标轴相交