vi.打呵欠,张开,裂开,<文学>张开大口
n.呵欠,无聊的人或事,裂口
A yawning North-South gulf has opened up with both sides digging in.
双方都坚持自己的立场,南北之间出现了一条鸿沟。
I felt so sleepy I couldn't stop yawning.
我感到很困,止不住地打呵欠.
Yawning is often contagious.
打哈欠常易于感染.