Weekdays are usually the days to go to work or school.

When summer comes, the number of people going to the tanning salon increases.

He wrote a letter using a hirazumi.

He always sits on the fence and avoids making decisions when problems arise.

It's fun to catch crabs in the tideland.

His face was full of happiness.

This compound has cyclohexadecane as its main component.

The theory of metric spaces plays an important role in many areas of mathematics.

There is a deep bond between him and me.

I was friends with her for 10 years.