绕口令里面有一句So'twasbetterBettyBotterboughtabitofbetterbutter.里面的语法问题.原文：BettyBotterhadsomebutter,"But,"shesaid,"thisbutter'sbitter.IfIbakethisbitterbutter,itwouldmakemybatterbitter.Butabit

Question

绕口令里面有一句So 'twas better Betty Botter bought a bit of better butter.里面的语法问题.
原文：Betty Botter had some butter,"But," she said,"this butter's bitter.If I bake this bitter butter,it would make my batter bitter.But a bit of better butter - that would make my batter better." So she bought a bit of butter,better than her bitter butter,and she baked it in her batter,and the batter was not bitter.So 'twas better Betty Botter bought a bit of better butter.
最后一句,So 'twas better Betty Botter bought a bit of better butter.
还有后面紧跟着的better Betty Botter bought a bit of better butter.
这个第一个better为什么在这里?语法点是什么?
注意，'twas 的解释肯定不是楼上两位的答案

Answer 1

TWAS
基本翻译
abbr.第三世界科学院（The Third World Academy of Sciences）
网络释义
TWAS:第三世界科学院|发展中国家科学院|发展中世界科学院
Twas so:那些不值得回味.|就算这样吧
TWAS Young Affiliates:通讯院士