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- The girl's pigtails swing to and fro as she runs. 小女孩一跑, 辫子就来回甩动。
- She swung to and fro on the swing. 她在秋千上摆来摆去。
- The models are swinging to and fro on the stage. 模特儿摆动着身子在舞台上来回走动着.
- To hang loosely and swing or sway to and fro. 悬荡,垂着摆动松散地悬挂着而且来回摆荡或前后摇摆
- Left to themselves, the electrons in these circuits naturally swing to and fro at the resonant frequency determined by the circuits' structure and dimensions. 如果没有外界的干扰,电子在这些线圈中会以共振频率自然来回振荡,而此共振频率取决于线圈的结构及大小。
- Trucks shuttled to and fro on the high ways. 车辆在高速公路上穿梭行驶。
- He is walking to and fro in the room. 他在房间内踱来踱去。
- The ship was rolling heavily to and fro. 那船晃来晃去很不平稳。
- The signals go to and fro at a very high but almost constant speed. 那些信号用非常快但几乎不变的速度来回传送。
- The cat made little rushes to and fro after the ball. 猫追着球跑过来跑过去。
- In watching its pendulum swing to and fro, 看着它的钟摆摇过去再荡回来
- The girl's pigtails swing to and fro as she runs 小女孩一跑,辫子就来回甩动。
- The tall chimney tottered (to and fro) and then collapsed. 那座高烟囱摇摇晃晃地倒了下来。
- Buses go to and fro between the center of the city and the city limits. 公共汽车往返行驶于市中心和城市边缘之间。
- Laune lay luxuriously swinging to and fro in his hammock, on a warm September afternoon. 九月里一个闷热的下午,劳瑞懒懒地躺在他的吊床里晃来晃去。
- Those boats are prepared for waftage to and fro. 那些船舶是准备用来来回运送货物的。
- The whole house rocked (to and fro) when the bomb exploded. 炸弹爆炸时整座房子都震得(前後)直晃。
- People are hurrying to and fro in the street. 街道上人来人往。
- The boat rocked to and fro on the water. 小船在水上前后摇晃。
- The boss traversed to and fro in his office. 老板在办公室来回踱步。