她用针在那块粗布上来来回回地穿进穿出。
She passed the needle through the rough cloth, back and forth.
人们在那儿来来回回地慢跑和骑自行车。
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。
ChiChi ran back and forth in front of his chair, straining at his leash as if to run down the beach.
You throw out little slips of paper and they take turns going back and forth.
你如果将竞价写在纸上,他们会来来回回地传阅。
People jog and bike up and down there.
人们在那儿来来回回地慢跑、骑自行车。
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