英语语法分析

It was Boleslaw III Wrymouth that unified Poland and it was he that was to divide it on his death bed among his sons.

尽管“勇敢者”博莱斯瓦夫三世对统一波兰厥功甚伟，但亦正是他去世导致的争储内讧，令整个国家四分五裂。