a way of marching with each person as close as possible to the one in front
紧密行进(行进队伍中与前面的人尽量靠近的行进方式)
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the trio marched in lockstep 这一伙三个人前脚接后脚地鱼贯而行
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[as adv.]
hundreds of shaven-headed youths march lockstep into the stadium .几百个剃光头的年轻人一个紧接着一个地走进了体育场。