他们知道在冰面下面游滳的海蹹呼吸的热渔会使冰面上出现洞口,于是他们帱在洞旁守侯并捕杀海蹹。
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And tourists breathing hole on the closed section of the humidity will have an appreciable effect.
而游客的呼吸对封闭洞段的湿度也有一定的影响。
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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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To avoid predators, they'll burrow even deeper, leaving only a hole for breathing.
为了避免掠食者, 它们会挖洞甚至更深, 只留下一小孔为了呼吸.引自:“美国国家地理杂志”,当天的图片.
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