当您将鼠标移至字段上面的时候将显示这些提示文字。
This text will appear as a tooltip when the users hover a mouse cursor over the field.
这意味着即使是缩至第二列的第三个图像，只要是鼠标移至其上的每个图像，服务器都会相应动作。
That means even if you're zooming down to the third image of the second column, you're hitting the server for each image your mouse moves over.
我们已经将画布清理干净（将画布的背景色设置为“白色”），并且当鼠标移至画布时，光标变为交叉（在X11中有 78种标准的鼠标光标形状，其名称可以在头文件 cursorfont.h 中找到，典型安装时，这个头文件可以在/usr/X11/include/X11/目录中找到。）
There are 78 standard mouse cursor shapes in X11, the names of which can be found in the header file cursorfont.h, which in a typical installation can be found in the /usr/X11/include/X11/ directory.
我们已经将画布清理干净（将画布的背景色设置为“白色”），并且当鼠标移至画布时，光标变为交叉（在X11中有 78种标准的鼠标光标形状，其名称可以在头文件 cursorfont.h 中找到，典型安装时，这个头文件可以在/usr/X11/include/X11/目录中找到。）
There are 78 standard mouse cursor shapes in X11, the names of which can be found in the header file cursorfont.h, which in a typical installation can be found in the /usr/X11/include/X11/ directory.
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