I was really surprised by his cruelly brusque treatment.

This area has a strong smell of sulfur.

This factory is emitting a large amount of sulfur dioxide.

He stayed in Europe for a year for business.

He visited many museums while staying in Europe.

Yō is my best friend.

His behavior is strange.

I couldn't understand the way he behaved.

She gave birth to a baby by Caesarean section.

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