Practice clicking your mouse left button on the graphic buttons on this screen.
在该屏幕的图形按钮上练习单击鼠标左键。
Practice clicking your mouse left button on the graphic buttons on this screen.
鼠标选中和点击的图片，按钮标题和标题队列。
Practice clicking your mouse left button on the graphic buttons on this screen.
鼠标选中和点击的图片，按钮标题和标题队列。
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