rank and file
n.
1590s, in reference to the horizontal and vertical lines of soldiers marching in formation; thence generalized to "common soldiers" (1796) and "common people, general body" of any group (1860).
| 词汇 | rank and file | 
| 词根词缀 | Online Etymology Dictionary rank and file n. 1590s, in reference to the horizontal and vertical lines of soldiers marching in formation; thence generalized to "common soldiers" (1796) and "common people, general body" of any group (1860). | 
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