当选择袋子的轮廓时，边界没有必要必须转换为复合曲线。

When selecting the profile for the pocket, the boundary does not have to be a composite.

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本文根据工程实例介绍了某个体育场施工中复合曲线上钻孔坐标的计算及测设方法。

Taking a stadium as an example, the paper introduces a method to calculate hole coordinates in complex curves.

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首先区分了氢源和氢阱的概念，然后通过氢源氢阱复合曲线和氢气剩余曲线在合成网络之前以图形的方式指出了最小氢气使用量。

Pinch technology is established on the concept of hydrogen sinks and hydrogen sources. Using the data of sinks and sources, hydrogen composite curves and hydrogen surplus curve are plotted.

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