1)direct predecessor,直前仟2)immediate predecessor,直前仟3)Destroying the enemy's defense in battlefront,直前破障4)orthogonal rake,垂直前角5)box front,平直前身6)go well up to bridle,勇往直前7)take one's courage in both hands,勇往直前8)autocollimation pre-telescope,自准直前置镜9)box front facing,平直前身贴边10)GG Go ahead Got it,"勇往直前，夺取目标"