| 单词 | rearguard | 
| 释义 | rear·guardBrE /ˈrɪəɡɑːd/ NAmE /ˈrɪrɡɑːrd/ noun (usuallythe rearguard ) [sing. + sing./pl. v. ]a group of soldiers that protect the back part of an army especially when the army is retreating after it has been defeated 后卫部队OPP vanguard | 
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