Seeing the yawns of the children, she sent them to bed.
看到孩子们在打呵欠，她就打发他们去睡觉了。These children rubbed their eyes and yawned as though waking up just now.
这些孩子又揉眼睛又打呵欠，好象刚刚睡醒来。He contends that the only exercise necessary for the perfect development of the body is yawning and stretching.
他认为要想使身体得到良好的发展，唯一要做的锻炼就是打呵欠和伸懒腰。Guests are never impressed to see a member of staff yawning or shouting across a room to a colleague.
客人看到酒店员工打呵欠或大声喊叫时，对酒店是不会产生好印象的；Then I shall know you're enjoying yourself, instead of sitting here idle, looking at the scenery and yawning your head off.
你就会过得很快活，免得像现在这样呆坐着，闲得无聊，只好看风景，打呵欠。Ants stretch when they wake up. They also appear to yawn in a very human manner before taking up the tasks of the day.
蚂蚁醒来时会伸懒腰。它们也像人一样，在开始一天的工作前打呵欠。In this period of life, yawning is an isolated behavior rarely occurring in bursts, and its frequency is quite low with respect to adults.
在此阶段，打呵欠属于独立行为，很少集中发生，和成人相比，频率也低。It's a "unified theory tying yawning, sinus ventilation, and brain cooling into a neat little package, " Hack said.
哈克说，将打呵欠、鼻窦通风和大脑降温捆绑在一起，这是一个统一的理论。The men just stare at him. One stifles a yawn.
那些人只是看着他，一个人抑制住打呵欠。