He drew back the tent flap and strode out into the blizzard.
他拉开帐篷的门帘，大步走进了暴风雪中。
《柯林斯英汉双解大词典》
2
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。
3
Flap problems. Folding back or removing the flap from the front of your eye during surgery can cause complications, including infection, tearing and swelling.