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leyla 发表于 2012-12-23 22:48

【back and forth】

[size=5]是副词短语,意为反复来回地行走或是斟酌等,例如①People usually move their arms back and forth when they walk.人们常在走路的时候来回摆动双臂。②I'd edit Tom's copy , and we'd go back and forth. 由我审编汤姆写的稿, 我们两人反复推敲[/size]

kobe 发表于 2012-12-24 12:07

back and forth   
反复地,来回地

簿子酒 发表于 2012-12-24 14:59

back and forth

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