Dictionary / Vocabulary / 一遍に
いっぺんに
(all) at once; at the same time; in one go; in one sitting
common word
爪を切るのとアイロンがけは、一遍にはできないよ。
I can't cut my nails and do the ironing at the same time!
一遍に二つのことはできないよ。
I can't do two things at a time.
一遍に2か国語も習ってるの?
Are you learning two foreign languages at the same time?