He goes fishing in the sea every day.

In linear algebra, the upper triangular matrix plays a very important role.

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

Understanding the concept of 'Ha-line conversion sounds' is important in learning Japanese.

I will go to school.

He was lying face-up, looking at the stars.

Listening to music is really enjoyable.

I sent a wrapped present as a token of my condolences.

Sumi makes sure to stay hydrated.