背突构成整个外鼻孔的后缘。

Nasal process of premaxilla forms the whole posterior margin of the naris.

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鼻翼软骨纤维环和鼻翼软骨肌肉环是维持外鼻下端形态和鼻孔对称的重要解剖结构。

Alar cartilaginous fibrous ring and alar cartilaginous muscular ring are very important anatomic structures to maintain the shape of the lower part of the nose.

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比如，能够用右手的大拇指按住右鼻孔，用右手的食指或外指按住右鼻孔。

For example, your right thumb will close off your right nostril while your right index or middle finger will close off your left nostril.

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