涎

例句：

1. 1. He licked his lips and tasted the salty flavor of the food on his tongue.
   他舔了舔嘴唇，尝到了食物的味道。
2. 2.The scientist was curious about the chemical composition of saliva.
   这位科学家对唾液的化学成分很感兴趣。
3. 3. The patient's mouth was dry, so she had to lick her lips frequently.
   病人的嘴唇很干，所以她不得不经常舔嘴唇。