Let R be an abelian ring ( all idempotents of R lie in the center of R), and A be an idempotent matrix over R.
设R是一阿贝尔环（R的所有幂等元都在中心里），A是R上的一幂等阵。
As the most important finance intermediaries, the commercial Banks lie in the center of the world's finance industry.
银行作为各种市场活动中最重要的金融中介，处于金融业的中心地位。
This paper presents a real-time tracking system which tracks moving object and makes the target always lie in the center of image frame assisted by controlling a servo device.
该文给出了一种运动目标的跟踪算法，它与云台设备控制相结合，可使被跟踪目标始终位于图像的中心区域。
A raised lawn in the center provides plenty of room to lie in the grass and people watch.
中间隆起的草坪提供了大量空间，人们可以躺在上面，或者在此休息、观看行人。
The three COINS lie in the fountain, which is located somewhere in the center of Rome.
这一座有着这三枚硬币的许愿池座落在罗马市中心的某处。
Here concave type of geometry is the one in which the local center of curvature of workpiece and tool center lie on the same side.
这里凹面型的几何一个在当地的中心曲率的工件和刀具中心所在站在同一边。
Here concave type of geometry is the one in which the local center of curvature of workpiece and tool center lie on the same side.
这里凹面型的几何一个在当地的中心曲率的工件和刀具中心所在站在同一边。
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