single file 的英语意思
single fileˌsingle ˈfile noun 
查看全部语言翻译 in single file moving in a line, with one person behind another排成一列纵队移动，一人跟着一人: 
We walked in single file across the bridge.我们排成一列纵队走过了那座桥。—single file adverb
查看全部语言翻译 in single file moving in a line, with one person behind another排成一列纵队移动，一人跟着一人: We walked in single file across the bridge.我们排成一列纵队走过了那座桥。—single file adverb