He is learning the basics of mathematics.

I am planning to travel to Kiso next week.

The first half of this year was very busy.

He took the table cover.

What does the tilde in this sentence mean?

Fluorine is an important element for dental health.

My computer is made of silicon.

Boron is one of the elements widely distributed in the earth's crust.

The ingredients for this dish are all locally sourced.

Mr. Yabuue is my best friend.