If you are catching a train,it is always better to be comfortably early than even a fraction ofa minute too late这句话中的better后的to 是什么用法?

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If you are catching a train,it is always better to be comfortably early than even a fraction ofa minute too late这句话中的better后的to 是什么用法?
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If you are catching a train,it is always better to be comfortably early than even a fraction ofa minute too late这句话中的better后的to 是什么用法?
If you are catching a train,it is always better to be comfortably early than even a fraction of
a minute too late这句话中的better后的to 是什么用法?

If you are catching a train,it is always better to be comfortably early than even a fraction ofa minute too late这句话中的better后的to 是什么用法?
be better to do A than do B 相比于B来说,做A更好一点
百度教育团队【海纳百川团】为您解答

这里是it形式主语,后面的不定式才是真正主语
it is + adj+to do sth

业精于勤

固定搭配吧。be better to sth. 比起什么来做什么更好