(noun.) an involuntary intake of breath through a wide open mouth; usually triggered by fatigue or boredom; 'he could not suppress a yawn'; 'the yawning in the audience told him it was time to stop'; 'he apologized for his oscitancy'.
(verb.) utter a yawn, as from lack of oxygen or when one is tired; 'The child yawned during the long performance'.
邦妮整理
手打:鲁迪