历史知识的一个重要特点,就是其研究内容已经不存在,我们无法直接去观察、获取知识,我们的学习主要是根据前人留下来的史料。历史也正是从无数前人遗留下来的史料中建立起结构、系统,因此要真正了解历史,就必须正确对待史料、学习史料、运用史料。史料,是反映历史本体的内容,是构成历史的材料,是人类 An important characteristic of historical knowledge is that its contents no longer exist. We can not directly observe and acquire knowledge. Our study is mainly based on historical data left by our predecessors. It is exactly from the historical materials left behind by innumerable forerunners that history has established its structure and system. Therefore, to truly understand history, historical materials must be correctly treated, historical materials used and historical materials used. Historical materials reflect the content of historical noumenon, constitute historical materials, and are human beings