一般词典都应该有。从这个句子的意思来看，你猜都应该猜出better than应该是more
than的意思。然后你会纳闷better 有 more 的意思吗？此时你需要查词典。
《韦氏高阶》better 释义第四条：: greater in distance or amount : more
It is better than nine miles to the next town.
It's better than an hour's drive to the lake.
The Free Dictionary: better than
1. Superior to, as in He's no better than Tom
at writing a memo. [9th century]
2. More than, larger in amount or greater in
rate, as in My new car can do better than 100 miles an hour, or The new plan
will cut better than 15 percent of costs. Some authorities consider this usage
colloquial and advise that it be avoided in formal writing.