If you annotate written work or a diagram, you add notes to it, especially in order to explain it.
例句
Historians annotate, check and interpret the diary selections.历史学家对日记选篇进行加注、核查以及阐释。...an annotated bibliography.附有注释的参考书目
英汉词典释义
vt. & vi.
注解,注释, 给…作注解（或评注）
an annotated text加有注释的文本Some people annotate as they read.有的人一面读书一面做注解。However, I knew I needed my own book to annotate.可是我知道我需要自己拥有来做笔记。Likewise directories themselves you should be able to annotate.同样地目录他们自己你应该可以注解。
英英词典释义
Verb
1. add explanatory notes to or supply with critical comments;
"The scholar annotated the early edition of a famous novel"
2. provide interlinear explanations for words or phrases;