从根本上说，这就是让您的样式表可移植的工具箱，就是说为其提供应对未知特性的办法。
In essence, this is a toolkit for you to make your stylesheets portable, by giving them ways to cope with unknown features.
根据我的经验，无论供应商在工具箱中包括了什么-不管它是自产的实用程序、第三方工具或是软件管理-我始终需要其它工具。
It has been my experience that no matter what the vendor has included in the box — whether it's home-grown utilities, a third-party tool, or software management — I always need other tools.
事实上，供应这500 箱我们还做了特别的努力。
As a matter of fact, we have made a special effort to get even these 500 cases for you.
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