Inversions can help clear the upper respiratory tract and drain secretions from the nose, allowing freshly oxygenated blood to flow into the oralcavity.
倒置体式能清理上呼吸道，排出鼻腔内的分泌物，让新鲜富氧的血液循环到口腔。
2
And it can mean a toxic breakdown product of alcohol called acetaldehyde - another carcinogen - can accumulate in the oralcavity when swished around the mouth.
而且酒精的代谢产物乙醛也容易通过漱口过程在口腔中堆积，这种物质也会致癌。
3
The 2004 Surgeon General's report adds more evidence to previous conclusions that smoking causes cancers of the oralcavity, pharynx, larynx, esophagus, lung and bladder.