single-fileCOCA⁹⁹⁸⁷⁰BNC¹⁷³⁹⁹⁵⁺² 基本例句 na.单行；🌏排成一列纵队而行；单文件 Especially if three or four people are going out of their way to walk single-file behind me for blocks and blocks while snuffing loudly like a pack of congested bloodhounds. 特别是三四个家伙偏离了单行道，导致后面交通阻塞，而他们自己却像拥挤的猎狗样贪婪的吸着香烟。 yeeyan