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- focal distance of objective 物镜焦距
- A method of timing accurate to millionths of a second is needed to find the distance of objects. 为求出物体的距离，需要一种精确到误差不出百万分之一秒的测时方法。
- Notice the difference in the apparent distance of objects that each focal length produces. 注意每种焦距所产生的物体视距的差异。
- At a distance of six miles you can't see much. 距离六英里以外的东西很难看清。
- The conclusion shows that reasonable selections of the focal distances of the main reflector may be able to obtain low RCS, keeping the high-gain under the antenna unchanged. 结果表明,在保持增益不变的情况下合理选择主反射面的焦距是能够达到降低雷达散射截面的需要的。
- A METHOD OF ACCURATELY MEASURING FOCAL DISTANCE OF LENS 精确测量透镜焦距的一种方法
- Frame vertical distance of its sub- object. 边框与其子物体的横向距离。
- The Function of Diaphragm in Measuring the Focal Distance of Lens 光阑在透镜焦距测量中的作用
- The distance of a light year boggles the imagination. 一光年的距离大得令人难以想象。
- The angular distance of a celestial object above the horizon. 地平纬度地平线以上天体的角度距离
- Love as an idea is a product of objective practice. 爱是观念的东西，是客观实践的产物。
- A sensory system in certain animals,such as bats and dolphins,in which usually high-pitched sounds are emitted and their echoes interpreted to determine the direction and distance of objects. 回声定位，某些动物，如蝙蝠、海豚等的感觉系统，通常能发出高音频的声音并能根据回声来判断物体的方位及距离。
- She looked back over a distance of ten years. 她回顾过去十年的时间。
- In this paper, the focal distance formula of lens in varied shapes is obtained by using object methods to make its physical meaning more obvious. 摘要采用直观的方法得出了空气中各种形状的薄透镜的焦距公式，使其物理意义更加明显。
- A sensory system in certain animals, such as bats and dolphins, in which usually high-pitched sounds are emitted and their echoes interpreted to determine the direction and distance of objects. 回声定位某些动物，如蝙蝠、海豚等的感觉系统，通常能发出高音频的声音并能根据回声来判断物体的方位及距离
- Stereoscopic vision is the direct perception of distances of objects, using both eyes. 立体视觉是两眼对物体距离的直观感觉。
- System: A serial of object interact on each other. 系统:发生相互作用的一组物体。
- The pigeon homed from a distance of 100 miles. 鸽子从百英里之外返回窝巢。
- The type or class of object to create. 要创建的对象的类型或类。
- Error Analysis and Ways to Make fewer in Measuring Focal Distance of Convex Lens 凸透镜焦距测量的误差分析和减小方法
