Hey,知识面的英文可以说成 "area of knowledge" 或者 "scope of knowledge"。如果你是在寻找一个更具体的单词,"vocabular" 也可以用来指代某个领域的词汇量。不过,最常用的还是 "area of knowledge" 或 "scope of knowledge"。比如,如果你想说“我对历史知识面很广”,就可以说 "I have a broad area of knowledge in history" 或者 "I have a wide scope of knowledge in history"。
Knowledge base
Knowledge base