open full mouth

例句：

1. 1. The door is open; please come in.
   门开着，请进来。
2. 2. The sun opens its eyes to the world every morning.
   太阳每天早晨向世界展开它的双眼。
3. 3. She opened the window to let fresh air in.
   她打开了窗户，让新鲜空气进来。