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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