1、You can imagine a bead with a wire going through it and the bead can only slideback and forth.(你可以想象一个有金属丝穿过的珠子而且这个珠子只能前后滑动。)
2、He continued walkingback and forth, muttering to himself; he had forgotten the King entirely.(他不断地走来走去，喃喃自语；他完全忘记了国王。) Hao86.com
3、The pendulum swingsback and forth.(这就像单摆一样来回摆动。)
4、The prosecution and defence were bandying accusationsback and forth.(原告与被告你来我往，互相指责。)
5、If two flying insect populations took up residence in separate nearby valleys, chances are that individuals from each population would flyback and forth, continuing gene flow.(如果有两个飞行昆虫种群居住在相距不远的不同山谷中，那么任一种群中的个体都有可能来回飞行，从而使基因流动继续。)
6、The people swayedback and forth with arms linked.(人们手拉手前后摇摆着。)
7、She passed the needle through the rough cloth,back and forth.(她用针在那块粗布上来来回回地穿进穿出。)
8、They continue callingback and forth until they all find each other again.(他们不停地来回打电话，直到他们再次找到彼此。)
9、From what I remember, water changesback and forth from water in lakes and oceans to vapor, and then back to water again when it falls as rain or snow, as precipitation.(根据我的记忆，水往复地变化，从湖泊和海洋里的水变成水蒸气，然后当它以雨或雪——也就是降水的形式落下时又变成水。)
10、So energy can goback and forth.(所以能量可以来来往往。)
11、This is the same arrangement found in an old-fashioned steam radiator, in which the coiled pipes pass heatback and forth as water courses through them.(这个结构与老式蒸汽暖气片相同，水流经散热器时，热量通过盘管来回输送。)
12、Don't move those flowerpotsback and forth.(你别来回摆弄那几盆花了。)
13、He and colleagues have shuttledback and forth between the three capitals.(他和同事们一直来回往返于3个首都之间。)
14、It'll have to make three tripsback and forth for the three trees.(那样就需要为了这三棵树而往返三次。)
15、A bus shuttles passengersback and forth from the station to the terminal.(一辆公共汽车在火车站和公共汽车终点站之间往返运送旅客。)
16、A winch shuttlesback and forth, and side to side, on a grid of rails above stacks of containers.(一台绞车在集装箱堆上方的轨道网上前后、左右穿梭。)
17、ChiChi ranback and forth in front of his chair, straining at his leash as if to run down the beach.(芝芝在他的椅子前面来来回回地跑，奋力拉扯皮带，似乎想跑下海滩。)
18、In Taipei buildings rockedback and forth.(在台北，建筑物前后摇晃着。)
19、A flock of sheep is walkingback and forth on the grassland.(一群羊在草原上来回走动。)
20、Rain gathered in a lotus leaf, like Yinzhu rollingback and forth in the above.(雨水聚集在荷叶上，像银珠在上面来回滚动。)
21、A Colombian who wants someone to approach him often signals with a hand movement in which all the fingers of one hand, cupped, point downward as they move rapidlyback and forth.(一个哥伦比亚人想要别人靠近他时，他的手势通常是一只手的所有手指都呈杯状，指向下方，同时快速地前后移动。)
22、He pacedback and forth.(他来回踱步。)
23、Pairs of opponents hit the ballback and forth until one winner emerges from all who entered.(一群对手来回击球，直到所有进入者中出现一名胜利者。)
24、The buoy floatedback and forth in the water.(浮标在水里漂来漂去。)
25、The windshield wipers clackedback and forth.(挡风玻璃上的刮雨器来回刮着，发出咔嚓声。)
26、The old man, still pacingback and forth, ceased to speak aloud, and began to mutter.(老人仍在来回踱步，不再大声说话，开始喃喃自语起来。)
27、back and forth I went with the slides.(于是，我就来来回回地放着幻灯片。)
28、You know, I am still not too clear about the hydrologic cycle, the transfer of waterback and forth between the earth and the atmosphere.(你知道，我仍然不是很清楚水文循环，也就是水在地球和大气之间的来回转移。)
29、She rocksback and forth on her chair like a mischievous child.(她在椅子上前后晃动，像个调皮的孩子。)
30、The same fluctuationback and forth occurs in areas other than intelligence.(同样的上下波动也发生在智力以外的领域。)
