Tyrosine is one of the amino acids needed to make proteins in the body.

Despite his youth, he is well-versed in worldly wisdom.

He is giving his all to his job at his post.

He holds a very high position in society.

The economic stagnation continues.

The economy is stagnating.

We are considering buying a new residential land.

Nitriding is often used to increase the surface hardness of metals.

High temperature and high pressure are required to nitridate this metal.

In ancient Chinese astronomy, they used the earthly branches to express time and direction.