We conducted an investigation on that issue.

We had a picnic in the field.

The cause of his lateness was the train delay.

The cause of his lateness was the train delay.

Mr. In deeply understands the teachings of Buddhism.

Smoking is considered a cause of carcinogenesis.

Chou is my best friend.

This painting is beautiful with the harmony of color and shape.

He started hearing auditory hallucinations from stress.

We conducted a field survey and procured the necessary materials on site.