This math problem is very dense.

What is this, that box?

Learning about the culture of Southeast Asia is very interesting.

My house is located in the southeast of the city.

He attended the party wearing a mask.

When I hear his name, old memories immediately come to mind.

When I picture his face in my mind, my heart warms.

He experienced that suffering in a fleeting moment.

His countenance was very bright.

He is always a person who acts with consideration for people.