分别介绍了空间直线与平面在数学及计算机中的表示方法，重点强调空间直线和平面位置关系的判定方法，并介绍了这一方法的应用。
The expression of line and level in three-dimensional space in computer is introduced respectively, laying the emphasis on the method of judging the position relation of line and level.
我对罗西基能在其他位置上有影响力表示怀疑，除了法布雷加斯和拉姆塞的位置。
I am doubtful that Rosicky will be influential anywhere else but where Fabregas and Ramsey play.
对关节间隙变量采用二维矢量表示法，分析了机器人关节间隙对机器人末端位置重复精度的影响。
The effects of the joint clearance variables to the position repeatability of the robot end effector are analyzed using a two-dimensional vector method to define the joint clearance variables.
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