[míng huǒ zhí zhàng]
（形容公开抢劫或肆无忌惮地做坏事） carry torches and weapons [clubs] in a robbery -- conduct evil activities openly; a daring robbery; commit armed robbery openly; an armed attack with torches; do evil things openly; fight openly; in an open way; operate in broad daylight
The enemy hidden in our ranks are of course much more dangerous than those acting in broad daylight.
隐藏在我们队伍中的敌人当然要比明火执仗的敌人更加危险。