In general, the left mouse button is used for all the primary direct-manipulation functions, such as triggering controls, making selections, drawing, and so on.
总的来说，鼠标左键用于所有主要的直接操作功能，如启动控件、选择及绘画等。
In general, the left mouse button is used for all the primary direct-manipulation functions, such as triggering controls, making selections, drawing, and so on.
总的来说，鼠标左键用于所有主要的直接操作功能，如启动控件、选择及绘画等。
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