Effective exaltation tooth and the immunity ability of the mouth cavity.

有效提高牙齿及口腔的免疫能力。

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Product in contact with mouth lip or mouth cavity directly. eg. Toothbrush, drinking straw.

会跟嘴直接接触的产品，例如牙刷，吸管。

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In the 4th stage larvae, the length of mouth cavity of A. duodenale is almost equivalent to its width, but that of N. americanus is shorter.

十二指肠钩虫第4期幼虫口腔的长宽几乎相等，但美洲钩虫宽大于长。

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"By that I mean try to imagine creating a cavity inside your mouth without any air bubbles and by letting in no air through your lips or throat -- it's basically impossible at sea level because the air pressure outside your mouth pushes the air pocket closed, " he said.

CNN: Training for civilian space travel is no picnic, Garriott says

My 13 yr old golden, Lacie, was diagnosed with a fast growing fibrosarcoma tumor in her mouth that was so advanced it had already grown into her nasal cavity and was an extremely large mass located in the roof of her mouth.

FORBES: When A Pet Has Cancer Part II