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- The axis of a circle is its diameter. 圆的轴线是其直径。
- The reciprocal of the radius of a circle. 曲率一个圆半径的倒数
- The diameter and the circumference of a circle. 圆的直径和圆周相关联。
- Tell the names of each part of a circle. 说出圆各部分的名称。
- He should have been the sun of a circle. 他本应该做一个周而复始的太阳。
- Almost all the balls follow the shape of a circle. 几乎所有球类都呈圆形。
- Circumference:The boundary line of a circle. 圆周:一个圆的边界线.
- A diameter passes through the center of a circle. 直径从圆心穿过。
- Teacher: What is the perimeter of a circle? 师：什么是圆的周长?
- Any two diameters of a circle intersect each other. 圆周内两直径必相交。
- Now he twisted himself into a circle, then stretched himself out on the ground like the trunk of a fallen tree. 它先把身子缩成一团，然后又申长，活象一截伐倒在地的树桩。
- The diameter and the circumference of a circle correlate. 圆的直径与圆周有相互关系。
- These are the Lagrange's equations of a potential system. 保守系统的拉格朗日方程。
- Calculate the perimeter and the area of a circle skillfully. 熟练地进行周长和面积的计算。
- equation of a circle 圆方程
- To mark or place(holes, for example) a fourth of a circle apart. 标示区域的四分之一将（如孔）标在或定在相距圆周的四分之一处
- The equation of deformation for the case of a trapezoid bar is given. 梯形杆件的形变方程.
- The radius of a circle described by a crank, cam, or similar machine part. (曲轴的)半径曲柄、凸轮或类似机器部件形成的圆的半径
- This equation is the local equation of mass conservation of a species in solution. 这个方程就是溶液中一种组分的局部质量守恒方程。
- One quadrant of a circle contains all possible values of Zxy. 圆的四分之一包括了所在可能的Zxy值。
