blowhole
/ˈbləʊhəʊl/noun
1- a hole for blowing or breathing through, in particular吹气孔, 呼吸孔, 尤指：
1.1
- the nostril of a whale or dolphin on the top of its head（鲸、海豚的）鼻孔。
1.2
- a hole in ice for breathing or fishing through冰上（供呼吸或用于捕鱼）的孔, 冰孔。
1.3
- a vent for air or smoke in a tunnel or other structure（隧道等的）通风孔, 排烟孔。