Topology is a branch of mathematics that abstracts and generalizes the concept of space.

I used cyclononadecane in an organic chemistry experiment.

This compound has cyclohexadecane as its main component.

This compound contains cyclotetradecane.

This compound mainly consists of cyclotridecane.

I am planning to go to Gangwon in Korea next week.

He finally achieved his goal after an extremely long period of time.

What is your number?

His jersey number is 23.

In Edo-period Japan, European languages were called 'barbarian language'.