Click the New button below the System Variables panel.
点击“系统变量”面板下的“新建”按钮。
Because those variables belong to the entire calculator, they are associated directly to the main panel.
由于这些变量属于整个计算器，所以它们直接连接于这个主面板。
Go to Control Panel, then System, then choose the Advanced TAB, then the Environment Variables button.
转到“控制面板”、“系统”，然后选择“高级”选项卡，然后单击“环境变量”按钮。
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