The change summary API allows you to query the Settings of all the objects in your graph and assess whether they have been changed or not.
更改摘要API允许查询图中的所有对象的设置，并确定是否已经对其进行了更改。
As I have not specified any more colors to override the default Settings, gnuplot will then use its own default colors for the rest of the graph.
因为我没有指定其他颜色以覆盖默认设置，所以对于图形的其他颜色，gnuplot仍然使用自己的默认颜色。
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