The only way for air to go inside HDA is through the breathing hole.

唯一的途径空气进去HDA的是通过呼吸孔。

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A polar bear may sit for hours at a breathing hole, waiting for a seal to surface.

一头北极熊会在呼吸口边坐上数个小时等待海豹出来换气。

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A Weddell seal mother and pup with their breathing hole, which must be kept continuously open.

一只威德尔海豹(Weddell seal)母亲和她的幼崽待在透气孔边上，透气孔必须得始终保持通畅。

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The 11 whales are confined in a space of about 30 feet by 30 feet, where they use an opening for a breathing hole, Inukjuak Mayor Petah Inukpuk said.

CNN: Canadians rush to save 11 trapped killer whales

When an actor acts with his eyes, you want to be looking at his eyes, not at a breathing plug-hole.

NEWYORKER: Show The Monster

Firemen, wearing breathing apparatus, dug a hole in the sand and turned the barrel over into the larger container.

BBC: 'Hazardous' chemical drum found on Jersey beach