The interpretation of "thousand mouths open" is that the word "thousand" and the word "mouth" just form a tongue character. "Everyone tastes sour and sweet" can be explained as: the tongue can feel taste, sour and sweet, and the tongue is possessed by everyone's body.

The second answer is Tian.

The word "ten" and "mouth" in "ten mouths" are combined into the word "field", and "sometimes yellow comes and sometimes green" is interpreted as the crops in the field are sometimes yellow and sometimes green.

Tongue is the organ of voluntary movement in oral cavity, which is located at the floor of oral cavity, based on skeletal muscle and covered with mucosa. It has the functions of stirring food, assisting swallowing, feeling taste and assisting pronunciation.