n.打呵欠；adj.张着大嘴的，打哈欠的；v.打呵欠( yawn的现在分词 )；张开，裂开； 英英释义： yawning[ 'jɔ:niŋ ]n.an involuntary intake of breath through a wide open mouth; usually triggered by fatigue or boredom"the yawning in the audience told him it was time to stop"同义词：yawnoscitanceoscitancy