名詞 blowhole:

1. the spiracle of a cetacean located far back on the skull
2. a hole for the escape of gas or air
   同義詞：vent, venthole, vent-hole

blow.hole

n.（名詞）
An opening or one of a pair of openings for breathing, located on the top of the head of cetaceans, such as whales and dolphins. The blowhole is opened by muscles upon surfacing and closed by the pressure of water upon diving.
鯨魚類的噴水孔：在鯨目動(dòng)物（如鯨、海豚）頭頂，用于換氣的單鼻孔或雙鼻孔中的一個(gè)。當(dāng)鼻孔在水面上時(shí)，由動(dòng)物肌肉牽引而張開，在水下時(shí)，由水的壓力合上
A hole in ice to which aquatic mammals, such as dolphins, come to breathe.
冰上的孔穴：生活在水中的哺乳動(dòng)物，如海豚，前來(lái)?yè)Q氣的冰面上的孔
A vent to permit the escape of air or other gas.
氣孔：空氣或其它氣體通出的通道