trail

A plane trailing a banner was circling overhead..一架飞机拖着横幅标语在上空盘旋。

on the trail,追踪，寻找；在山径上

audit trail,审查跟踪，尾随审查；查帐索引；逐位跟踪

follow the trail,顺着足迹

in trail,adv. 成一列纵队；挨次

on the trail of,跟踪追赶

paper trail,书面记录

blaze a trail,开辟道路；在树上作记号指路

nature trail,通往自然景观的小径

off the trail,出轨；失去踪迹；偏离目标

appalachian trail,阿巴拉契亚山道；阿帕拉契山径

on trail,受审；试行；在实验中