If the last point does not match the first point, an additional curve segment is added from the last point to the first point to close it.
如果最后一个点不匹配第一个点，则在最后一个点和第一个点之间添加一条附加曲线段以使其闭合。
If the last point does not match the first point, an additional curve segment is added from the last point to the first point to close the figure.
如果最后一个点不匹配第一个点，则在最后一个点和第一个点之间添加一条附加曲线段以使该图闭合。
If the last point does not match the first point, an additional curve segment is added from the last point to the first point to close the figure.
如果最后一个点不匹配第一个点，则在最后一个点和第一个点之间添加一条附加曲线段以使该图闭合。
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