yawnv.打呵欠;张开n.呵欠;<口>乏味的人(事)
yawning reflex呵欠反射
yawn for sb.(地狱)张着大口等着某人
yawning moment方向力矩
yawn out a good night打着呵欠道声晚安
Yawning and stretching呵欠和伸懒腰
Yawning is contagious.打呵欠是有感染性的.
Yawning is often contagious打哈欠常易于感染。
Yawning Helps Keep You Alert刺痛觉
Yawn yawned his disapproval of表示意兴阑珊
Yawning is often contagious.打哈欠常易于感染。