twitter-bootstrap 如何更改关键字 xs sm md lg 的引导程序默认大小？
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How to change bootstrap's default sizes for the keywords xs sm md lg?
提问by ahnbizcad
According to http://getbootstrap.com/css/#grid-options, the default cutoffs for xs, sm, md, lg are cut off at 768px, 992px, and 1200px.
根据http://getbootstrap.com/css/#grid-options，xs、sm、md、lg 的默认截止值为 768px、992px 和 1200px。
Can I still use those columns keyword classes like .col-xs-3without having the widths at which different sizes (e.g. xs sm md lg) are triggered at?
我是否仍然可以使用那些列关键字类，例如.col-xs-3没有触发不同大小（例如 xs sm md lg）的宽度？
For example, I want xs cutoff point to be 420px instead of 768px, while still being able to use .col-xs-3(instead of having to define custom column widths)
例如，我希望 xs 截止点为 420px 而不是 768px，同时仍然可以使用.col-xs-3（而不是必须定义自定义列宽）
