a. 嘴对嘴mouth-to-mouth
口对口人工呼吸mouth-to-mouth breathing【外科】
沼兰属植物adder's-mouth
马口horse's mouth
含hold in the mouth
脓耳口眼喎斜deviation of the eyes and mouth due to purulent ear
看来一本正经, 装得老实look as if butter would not melt in one's mouth
【医】 口腔菌丛mouth-flora