一部

一部

"One part," "a portion," or "a section."

Here, '一部' (ichibu) refers to a portion or a part of the book, indicating a part of the whole.

この本の一部だけを読みました。

I only read a portion of this book.

Here, '一部' means partly or partially, emphasizing that only a part of the law was revised.

この法律は一部改正されました。

This law has been partially amended.

In this sentence, '一部' conveys the meaning of being a part or subsection of a larger entity, in this case, the plan.

私たちの計画の一部として、公園を掃除します。

As a part of our plan, we will clean the park.