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- To move to and fro over; cross and recross. 迅速的來回或上下移動。
- He continued to move to and fro over the soft carpet. 他繼續在柔軟的地毯上來回走動。
- She was moving to and fro about her work, alert, joyous and robust. 她跑來跑去地幹活，手腳輕健，興高采烈，身強體
- Trucks shuttled to and fro on the high ways. 車輛在高速公路上穿梭行駛。
- He is walking to and fro in the room. 他在房間內踱來踱去。
- The ship was rolling heavily to and fro. 那船晃來晃去很不平穩。
- The signals go to and fro at a very high but almost constant speed. 那些信號用非常快但幾乎不變的速度來回傳送。
- It is a disc or collar with an irregularly shaped edge, which operates in contact with a rod or lever, and causes it to oscillate, or to move to and fro. 它是一個不規則形的圓碟或圓環，和一個桿或棒連接運作，使它上下或往來擺動。
- The cat made little rushes to and fro after the ball. 貓追著球跑過來跑過去。
- Now he felt weightless again and with an ever-so-slight motion of the tail he could move to and fro, up and down, as before. 現在，他重新感覺到身體輕飄飄的，尾巴稍稍一擺，他就能在水裡游來游去，游上游下，和從前一樣。
- Polybag sealer : No water need.Place the head and move to and fro on both side of the part where would like to be sealed. 膠袋封囗機： 不用加水，將清洗頭在需密封的部位上、下兩邊來回輕壓，大部份膠料也合用。
- The tall chimney tottered (to and fro) and then collapsed. 那座高煙囪搖搖晃晃地倒了下來。
- Buses go to and fro between the center of the city and the city limits. 公共汽車往返行駛於市中心和城市邊緣之間。
- A few clouds of dust moving to and fro signify that the army is encamping. 少而往來者，營軍也；
- Those boats are prepared for waftage to and fro. 那些船舶是準備用來來回運送貨物的。
- Moving to and fro. 來來回回的移動
- The whole house rocked (to and fro) when the bomb exploded. 炸彈爆炸時整座房子都震得(前後)直晃。
- Cam: A device for converting circular or rotary motion into reciprocating motion. It is a disc or collar with an irregularly shaped edge, which operates in contact with a rod or lever, and causes it to oscillate, or to move to and fro. 凸輪:把旋轉動力轉為往複力的機件。它是一個不規則形的圓碟或圓環，和一個桿或棒連接運作，使它上下或往來擺動。
- People are hurrying to and fro in the street. 街道上人來人往。
- The crowd moved to and fro in the rooms like an ebb and flow of turquoises, rubies, emeralds, opals, and diamonds. 人群擁來擁去，象是一道由藍寶石、紅寶石、翡翠、貓眼石和金剛石組成的渦流一樣。
