Free fatty acids are used as an energy source in the body.

Essential fatty acids are vital nutrients for our health.

Essential amino acids cannot be produced by the human body, so they need to be obtained from the diet.

He said, 'It's difficult to make a life,' explaining the phrase 'When a man steps over the threshold, he has seven enemies.'

This ancient proverb, 'know the other side and yourself, and you will not be in danger in a hundred battles', teaches us the importance of understanding ourselves and others.

His efforts were like a mantis trying to stop a chariot, he couldn't achieve any results.

We will act according to the Mountain Standard Time.

This shape is called a gyrobifastigium.

He ate three apples.

The character '喰' means to eat.