| 单词 | 单鼻孔 |
| 释义 | 〔blowhole〕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.鲸鱼类的喷水孔：在鲸目动物（如鲸、海豚）头顶，用于换气的单鼻孔或双鼻孔中的一个。当鼻孔在水面上时，由动物肌肉牵引而张开，在水下时，由水的压力合上 |
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