What is the answer to Ant Manor on March 22? Today's topic is, why was a defeated battle called "defeat" in ancient times? Does hair also need sun protection? Answer daily questions through Ant Manor. After answering correctly, you can get feed. Let's take a look. !

　　1. Why was a defeated battle called "defeat" in ancient times?

Correct answer:The loser turns his back on the winner and runs away

Defeat refers to defeat in a battle. The word "defeat" comes from "Historical Records of Xiang Yu": "I have been eight years old since I started the army. I have fought more than seventy battles. Those who were in charge were defeated, those who were attacked were subdued, and I have never been defeated!" In ancient times, when two armies were fighting, if one side was defeated, they would flee backwards, with their "backs" facing the victorious side. Therefore, the word "North" has the added meaning of "failure"!

　 2. Does your hair also need sun protection?

Correct answer:need

Hair is composed of keratinocytes. Most of the keratinocytes are keratin. Keratin is composed of a long amino acid chain. This amino acid chain has about 20 kinds of amino acids, most of which are cystine. When exposed to sunlight, cystine in the hair absorbs ultraviolet rays and protects the scalp. However, after being exposed to the sun, cystine absorbs a large amount of ultraviolet rays, which will break and decompose its own disulfide bonds. The keratin in the hair will be denatured and broken, and the hair will lose its original moisture and nutrients. Therefore, the hair will become damaged. Sun protection is also required.