yawns

n.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"

同义词：yawningoscitanceoscitancy

v.

utter a yawn, as from lack of oxygen or when one is tired

"The child yawned during the long performance"

be wide open

同义词：gapeyaw

1. She yawns every time the lecture gets boring.
   每当讲座变得无聊时，她就打哈欠。
2. The cat yawns lazily as it stretches on the windowsill.
   猫懒洋洋地伸展身体，打了个哈欠。