This factory is emitting a large amount of sulfur dioxide.

He visited many museums while staying in Europe.

He stayed in Europe for a year for business.

This hot spring has a high sulfur content.

I was really surprised by his cruelly brusque treatment.

His behavior is strange.

I couldn't understand the way he behaved.

Yō is my best friend.

The staff at that restaurant provided astonishingly kind treatment, and we were very satisfied.

She gave birth to a baby by Caesarean section.