He tried to solve the problem all day long.

Our store has a regular day off every Monday.

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

Interracial marriage promotes diversity and understanding.

Intermolecular forces are an important factor in determining the properties of a substance.

He is doing special exercises to strengthen the interosseous muscles of his hand.

The mesentery plays a role in supporting the intestines.

His work progress is slow.

Well, let's get started!

Mr. Hiruma is my best friend.