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advanced guard

[əd'vɑ:nst'gɑ:d]
一般 avant-garde f
 英语 词库
advanced guard [əd'vɑ:nst'gɑ:d]
军队 The leading element of an advancing force. The primary mission is to ensure the uninterrupted advance of the main body
军队, 后勤 Close security detachment sent ahead of a marching troup to provide it with intelligence, to cover it and to facilitate its engagement. (FRA)