1. The only way that they can preserve their history is to recount it as sagas--legends handed down from one generation of story-tellers to another.

解读:legends作sagas的同位语,后接被动分词短语做定语。

基本结构：主＋定＋谓＋宾＋同位。

翻译:他们保存历史的唯一方法是把历史作为英雄故事讲述--由说书者代代相传。