There is a well-known advertisement "Nongfu Spring is a little sweet", but I have never really questioned its credibility, and I have never really felt "sweetness" with my heart.

During the summer vacation, I stayed at my aunt's house for a few days before I really understood "sweetness" and learned why it was! My aunt lives at the foot of Hushan near Fuyang No.2 Middle School. There is a small clear water flow on the mountain, which flows directly down the mountain. The residents next to her use pipes to follow the water flow. Next, a small water intake is formed, where everyone can wash and drink pure natural water.

After dinner that day, I went to the mountain to walk my dog with my aunt and saw a discarded Nongfu Spring bottle in the grass by the roadside. While complaining that passers-by didn't understand environmental awareness, I thought of that slogan. So I asked my aunt, "Is this landscape really as sweet as Nongfu Spring advertisement?" "Then you can try it yourself. This is the authentic mountain spring water." Aunt replied with a smile. So, I leaned forward, put my hands together and held a little water in my palm, and then sucked it into my mouth. What slowly seeped into my heart and spleen was a little cold, and then a little sweet, a little faint sweetness that could not be easily discovered. It's a little sweet! I screamed with excitement. But why is it a little sweet? I turned my questioning eyes to my aunt. Aunt said, "Go back and look for it yourself." I nodded.

at home, I finally understood the origin of sweetness by looking up reference books and computers. It turns out that when people eat water into their mouths, they will come into contact with saliva, and saliva itself contains amylase, which is to participate in the synthesis and assimilation of maltose and decompose its components; Moreover, the sweet buds on the tongue are on the tip of the tongue, which is the first contact with food. This is why we like to add them with the tip of the tongue when we taste sweet things. It turns out that not only Nongfu Spring is a little sweet, but almost all unpolluted water will taste sweet.

In life, there are little scientific knowledge everywhere. As long as we have a pair of eyes that are good at finding and solving problems, we can all gain knowledge and gain achievements from the little things in life!