If someone in your circle is making reference to something, it's likely important enough that you should be aware of it.

如果你交际圈子中的人提到某件事，这表明它可能是比较重要的，你应该知晓它。

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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。

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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；

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But he was eventually talent-spotted by Lord Browne, and became one of his Turtles (a name Browne gave to his inner circle of high fliers) - a reference to the fearsome cartoon warriors, the Teenage Mutant Ninja Turtles.

BBC: BP chief executive Tony Hayward