| 释义 |
●(in) single/Indian ˈfilein a line, one person after another 排成一列◆The whole class walked along behind the teacher in single file.
全班排成一队跟在老师的后面走过来。 ORIGIN When American Indians walked in a group, each person walked in the footsteps of the person in front so that they could not be counted by the enemy. 一队美洲印第安人集体行动时，后面的人会踩着前面一人的脚印走，以免被敌人发现己方的确切人数。 |
