Sniffing is regulated by the soft palate, a flap of tissue in the back of the throat that directs the flow of air through the mouth and nose.
闻嗅由软腭控制，那是位于喉咙后面的组织，通过不停来回拍动来导向经过嘴和鼻子的气流。
2
Even in aerobic activity the thermo-formed and ergonomically adjusted contact surfaces enable the free flow of air on the back.
即使在有氧运动的热形成和变化，符合人体工程学的接触面，使空气在背面自由流通。
3
In this paper, we present a new type of hybrid arc quenching system, which controls the metal vapor and backflow of the hot air in splitters arc quenching chamber.