These rules are strictly based on the IBM Accessibility Guidelines and are used to indicate all deviations from the expected practices.

这些规则是严格建立在IBM Accessibility Guidelines基础之上的，并用来指出所有偏离预期应用的行为。

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With all of the tests available to you as CSS classes you can fork even your CSS rules based strictly on what the browser can do.

如果所有的测试都通过的话，你甚至可以很严格规范地书写你的CSS代码。

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All these rules must be strictly observed.

所有这些规定都必须严格遵守。

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