生活在水中的哺乳动物，如海豚，前来换气的冰面上的孔。
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动物，如海豚，前来换气的冰面上的孔。
A hole in ice to which aquatic mammals, such as dolphins, come to breathe.
冰上的孔穴：生活在水中的哺乳动物，如海豚，前来换气的冰面上的孔。
A hole in ice to which aquatic mammals, such as dolphins, come to breathe.
从眼前来说，地们对我们中间有些游不到5码便急不可待想换气的人来说，总该是个鼓励吧。
Meanwhile, they should encourage those among us who cannot swim five yards before they are gasping for air.
从眼前来说，地们对我们中间有些游不到5码便急不可待想换气的人来说，总该是个鼓励吧。
Meanwhile, they should encourage those among us who cannot swim five yards before they are gasping for air.
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