follow one another closely; march in single file ❍ 我们连星夜出发，在急行军中连长一马当先，我们～。Our company set out by starlight with the company commander at the head and we followed him closely in the rapid march.
衔尾相随xián wěi xiānɡ suí
衔：马嚼子；尾：马尾巴。形容一个紧跟着一个，单行前进。go ahead one by one, march in single file, follow one another closely, walk one after the other