frame命令创建了一个称为 .rc 的窗口，其边界宽度为2 个像素。
The frame command creates a window called .rc with a borderwidth of two pixels.
这两个属性的值可以是数字，表示绝对像素大小，也可以是百分比，表示相对于浏览器窗口高度和宽度的百分比大小。
Both attributes accept either a numeric value, indicating an absolute size in pixels, or a percentage, indicating the size as a percentage of the browser window height and width.
设置窗口的宽度（以像素为单位）。最小值为250，指定浏览器内容区域的最小宽度。
Sets the width of the window in pixels. The minimum value is 250, and specifies the minimum width of the browsers content area.
将弹窗口的宽度设置为400像素，高度设置为500像素。
Sets the popup window's width to 400 pixels, and height to 500 pixels.
的高度和宽度的形象代表的像素数量，将填补渲染窗口。
The height and width of the image represent the number of pixels that will fill the rendering window.
的高度和宽度的形象代表的像素数量，将填补渲染窗口。
The height and width of the image represent the number of pixels that will fill the rendering window.
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