The browser must be "instructed" to look for the print styles in the style sheet, and they must be in their own section.
必须“指示”浏览器在样式表中找到打印样式，而且它们必须在它们自己的部分。
The browser must be "instructed" to look for the print styles in the style sheet, and they must be in their own section.
必须“指示”浏览器在样式表中找到打印样式，而且它们必须在它们自己的部分。
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