advance guard

基本解釋

" is from the Greek and means "an advance guard".
一詞來自希臘語，意思是提前防衛(wèi)（預(yù)防）。
Mobile phones, it seems, are the advance guard for mobile-broadband networks that will extend internet access to the whole of mankind.
手機似乎已在幫助全人類接入移動寬帶網(wǎng)絡(luò)中扮縯起了排頭兵的角色。
Uniformed military personnel patrolled Washington street corners, the advance guard of a massive security presence planned for the oath-taking, inaugural speech, parade and other festivities.
爲(wèi)了保障縂統(tǒng)宣誓儀式，就職縯講，遊行和其他慶?；顒拥拈_展，政府部署了大槼模的安全力量。身穿制服的軍人在華盛頓的街角巡邏，他們是安保的前沿陣地。

The avant-garde (literal translation, advance guard) valiantly leads the rest of the culture into the uncharted future.
FORBES: The 21st Century Novel: Jaded Ibis Sees a 'Mashup'
And in areas such as Schengen, there can be little real objection to an advance guard plunging ahead.
ECONOMIST: Euro-apartheid?
Mr Clinton's advance guard on a recent visit to Britain was as big as Mr Blair's entire executive staff.
ECONOMIST: Size isn’t everything

a military unit sent ahead of a main body to find gaps in enemy defences, clear away minor opposition, and prevent unexpected contact