基本解释n.向后转；(态度、举止、观点等的)彻底改变v.向后转；彻底改变同根派生 英汉例句用作名词 (n.)He made an abrupt about-face and left the room.他突然向后转，离开了房间。His choice of that house was an about-face from his original intention.他选择这个房子的念头是改变后的决定