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(尤指小學(xué)生排成的)長隊;（行進車輛排成的）長蛇陣
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.
孩子們排隊從校舍去餐廳吃午飯。
...a long crocodile of coaches.
排成一長串的長途客車