He understands the meaning of the proverb 'Teaching is half learning', which means that teaching leads to one's own learning.

By regularly checking the key performance indicators, you can understand the performance of the company and devise improvement measures.

He went to see a movie with his South Korean friend.

I am majoring in Korean studies at university.

He continues to practice in search of complete enlightenment.

I have been studying Japanese for three months.

Sanichi is my best friend.

In response to her help, he said 'Thank you'.

He drew a triangle on the blackboard.

He prefers to speak in the third person.