He is clearly a night owl, working late into the night and sleeping late into the morning.

I heard that she works in the nightlife industry.

I made new friends in the Seiya chat room.

We made a lot of memories during these thousand nights.

Senya is my best friend.

He suffered from external bleeding due to an accident.

He has experience living in a foreign country.

That proposal is completely unthinkable.

We are searching for extraterrestrial life.

Please teach me how to calculate the circumcenter of this triangle.