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

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

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

Mr. Ochi is my best friend.

Mr. Adachi is my best friend.

Mr. Chida is my best friend.

Those guys are always late.

I will take the afternoon off today.

Let's study at the library in the afternoon.

This compound word comes from English.