circle of reference

基本解释

Formulas are given in many mechanical manuals to calculate the tooth thickness at only the reference circle of worm and worm wheel.
蜗轮蜗杆的分度圆齿厚在大部分机械手册中都给出了计算公式，但在其它任意半径处的齿厚计算很少有资料涉及。
The precision of Newton iterative method is the better, but its calculating quantity is large and complex, moreover it can't get coordinate of center of the best fitting reference circle.
牛顿迭代法的精度较高，但计算量大也最复杂，且不能直接得到最接近参考圆的圆心位置坐标；
The least square fitting method is simple and prone to program without derivative, integration and iterative, furthermore it can work out the coordinate of center of the best fitting reference circle.
最小二乘法的计算方法简单，不涉及求导、积分、迭代，适合编写计算程序，且可直接得到最接近参考圆的圆心位置坐标。

The questions they are asked in the media and in real life constantly circle simplistically around the same frames of reference — terrorism, women, and assimilation — fixations that may be understandable in this age but frequently overlook the complex human dimensions of Muslim-American or Arab-American life.
NPR: Many Arab-Americans Still Perceived As A 'Problem'