back and forth
1
来回, 前后
repeatedly going in one direction and then in the opposite direction
- The pendulum swung back and forth, marking the passage of time.
钟摆来回摆动，标志着时间的流逝。
- The children played catch, throwing the ball back and forth.
孩子们玩接球，把球来回扔。
- The windshield wipers moved back and forth, clearing the rain from the car window.
雨刷来回移动，清除了车窗上的雨水。
- The boat rocked back and forth with the gentle movement of the waves.
船随着波浪的轻柔运动来回摇晃。
- The swing swayed back and forth as the child enjoyed the playground.
秋千来回摆动，孩子享受着游乐场。