This is the 3483rd most frequent Chinese word.
整齐
Tidy or orderly.
In this sentence, '整齐' describes the orderly arrangement of books in the room.
房间里的书都排列得很整齐。
The books in the room are arranged neatly.
Here, '整齐' emphasizes the neat and uniform appearance of the students' outfits.
这群学生穿着整齐的校服参加了活动。
The group of students attended the activity in neat uniforms.
In this usage, '整齐' refers to the organized and ordered presentation of the data after processing.