at the same time (同時に): She is studying and working at the same time. (彼女は勉強と仕事を同時にしています。) - 試験に出る! 英単語検索辞書

at the same time (同時に): She is studying and working at the same time. (彼女は勉強と仕事を同時にしています。)

She is studying and working at the same time.