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- The shuttle moves backwards and forwards through the warp. 梭子在经线中来回移动。
- An owl's versatile toe can move backward and forward. 猫头鹰的脚趾能够前后自由转动。
- to move backwards and forwards 来回移动
- The chair isn't very sturdy. Don't move backwards and forwards when you are on it. 这椅子不结实，别在上面前俯后仰地乱动。
- Furthermore in parallel passages the body has to move sideways, not backward and forward, according to the location. 此外并行弹奏进,根据手的位置的不同,身体不得不横向移动,而并不是前后地动。
- An oscillator is a device which moves backwards and forwards at a regular speed. 振荡器是一个以固定速度前后摆动的仪器。
- He understood automobile engines backwards and forwards. 他对汽车发动机了解得一清二楚。
- Travelling backwards and forwards everyday cost him too much money. 每天来回花了他太多的钱。
- A computer operator who was typing the computer's moves made an error on the keyboard and a knight was moved backwards and forwards several times by mistake, before the game continued. 一位在键盘上打出电脑走棋步骤的电脑操作员出了个错，一只“马”被前后移动好几次，比赛才得以继续。
- He began to pace backward and forward on the bridge. 他开始在桥上来回踱步。
- She rocked backwards and forwards on her chair. 她坐在摇椅上前后摇晃着。
- She was always coming backwards and forwards. 她经常来来往往。
- She was rocking backwards and forwards in her seat. 她在座位上前摇后晃。
- He strolled backwards and forwards on the lawns. 他在草坪上来回遛达。
- It moves, it vibrates backwards and forwards. 它在运动，前后震动。
- He knew his lesson Backwards and forwards. 他彻底了解他的功课。
- She kept moving backward ( s ) and forward ( s ). 她不停地来回走动。
- I know it backwards and forwards. 我对此了如指掌。
- The pendulum swung backwards and forwards. 钟摆摆来摆去。
- Swallows are flying backwards and forwards. 燕子穿梭飞来请作答!!
