词性：n.
音标： /ˈvænɡɑrd/
释义：先锋，领头羊，先头部队，领导者。
vanguard can be more widely applied. You might talk about the vanguard of fashion on the red carpet, the vanguard of medical research at a university, or the vanguard of a political movement at a demonstration.
in(at) the vanguard of
at vanguard