gum running

例句：

1. 1. She was so hungry that she started to gum running.
   她太饿了，开始流口水。
2. 2. The baby was drooling and couldn't stop.
   婴儿在流口水，停不下来。
3. 3. He was so thirsty that he started to gum running.
   他太渴了，开始流口水。