peripheral

adj. /pəˈrɪfərəl/ C1

次要的；周边的

Not as important as the main part of something.

仙境例句

To the Caterpillar, Alice's feelings were peripheral; the main thing was the poem.

对毛毛虫来说，爱丽丝的心情无关紧要，要紧的是那首诗。