This is the 4784th most frequent Chinese word.
组成部分
Component; part.
In this sentence, "组成部分" is used to indicate that books are an integral part or element of the broader concept of knowledge.
书籍是知识的组成部分。
Books are a component of knowledge.
Here, "组成部分" highlights that students form a vital segment or part of a school as a functional or operational entity.
学生是学校的重要组成部分。
Students are an important component of a school.
"组成部分" in this context emphasizes that trees are a basic and essential part of the composition of the natural environment.