The prophet of Islam is Muhammad.

Levi, the third son of Jacob, is considered the ancestor of the Levites who serve God.

The cat's tail is long and very beautiful.

In chemistry class, I learned about alkanes.

Alkynes play a very important role in organic chemistry.

Alkenes, also known as olefin hydrocarbons, play an important role in organic chemistry.

Alkenes play a very important role in organic chemistry.

Mobile phones have become indispensable in our lives.

I am good at calculations.

He supported our project.