It turns out that accurately placing text aligned vertically and horizontally around the perimeter of a circle is somewhat complicated, so a simple trial-and-error approach is shown on lines 80-107.

结果证明精确地放置文本(围绕圆形的周边垂直并水平对齐文本)有些复杂，因此在第80行至第107行中显示了一种简单的试错方法。

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With the tool of circle vector function, the involute helix profile with error is given, and with the media of engagement line, the error compensation mathematical model is established.

以圆矢量函数为工具，推出了误差条件下的渐开螺旋面方程，并以啮合线为媒介，建立了测量蜗杆误差补偿的数学模型。

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The text analyses some key problems of accurately machining of O circle mould cavity, including its technology, measurement, and machining error, and then puts forward a CAD example for it.

对O形圈模具型腔精确加工中的工艺、测量及加工偏差等几个关键问题进行了分析，并针对实例进行了计算机辅助设计。

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He meant to share it with his Circle of Google colleagues, but through some user error, he instead shared it publicly.

FORBES: Whoops. Google Engineer Accidentally Makes His 'Plus Sucks' Rant Public.