a hole for blowing or breathing through, in particular 吹气孔,呼吸孔,尤指 ■the nostril of a whale or dolphin on the top of its head (鲸、海豚的)鼻孔 ■a hole in ice for breathing or fishing through 冰上(供呼吸或用于捕鱼)的孔,冰孔 ■a vent for air or smoke in a tunnel or other structure (隧道等的)通风孔,排烟孔