一部の

some

→ 一部
phrase Rare #37,117
some Used before a noun to refer to a portion of a larger group, rather than all of it.
JA: 一部の学生は電車で通学します。
EN: Some students commute by train.

一部の大学の先生は授業に遅く来て早く帰る。

Some university professors arrive late to class and leave early.

一部の病院は幼児用ミルクの無料見本を配布する。

Some hospitals distribute free samples of infant formula.

“一部の白人を傷つける不当な告発もあった”

There were also unjust accusations that hurt some white people.

— マルコムX (1992)

一部の疾患の原因は欠陥遺伝子です。

Defective genes cause some diseases.