By the improvement of demonstration experiment on optics, we able to observe the optical path and further understand to optical principle.
通过对光学演示实验的改进，使我们能够观察到光路，加深了对光学原理的理解。
The principle of sympathy is an important path by which moral sense arise and produce effects.
同情原则是道德感产生和发生作用的重要途径。
The NLOS sound signal usually arrives at acoustic array by diffraction, and the diffracted transmission path is a geodesic according to the extensive Famat's principle.
非视距声信号通常经过绕射到达基阵，根据广义费马原理，传播路径为一条短程线。
In this way, the controlled variables and operating variables can be described in the same matrix, using the optimal operating path solved by the principle of optimal control.
这样，把受控变量、操纵变量在同一个矩阵中描述出来，利于应用最优控制原理求解出优化的操作路径。
The principle and property of synchronous focusing of a twin-laser in same light path and its realization technique are described. The design result is evaluated by use of a practical example.
叙述同一光路中双激光获得共焦的原理和特点及其实现技术，并就一实例的设计结果进行评价。
The principle and property of synchronous focusing of a twin-laser in same light path and its realization technique are described. The design result is evaluated by use of a practical example.
叙述同一光路中双激光获得共焦的原理和特点及其实现技术，并就一实例的设计结果进行评价。
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