一伙: a gang of; a band of 短语和例子一伙匪徒 a gang of gangsters
勾结: collude with; play footsie (with); in league with; be hand and glove with; collaborate with; gang up with 短语和例子与 ...相勾结 in collusion with...; 勾结成一伙来对付某人 gang up against [on] sb.; 既勾结又争夺 at
一伙人: grouof people who regularly associate together