N-COUNT
(尤指小学生排成的)长队;（行进车辆排成的）长蛇阵
A crocodile of people, especially school children, or vehicles is a long line of them, moving together.
例句
The children walk in crocodiles from the schoolhouse to the dining-room for lunch.
孩子们排队从校舍去餐厅吃午饭。
...a long crocodile of coaches.
排成一长串的长途客车