During an earthquake, the longitudinal waves arrive first.

I love playing the vertical flute.

This book is written in vertical typesetting.

In this graph, the vertical axis represents time.

In this picture, a red vertical line is drawn.

This building is surrounded by firewalls.

His favorite vase is placed in this niche.

I thought his plan was perfect, but in fact there were some flaws.

He said there's no such thing as a perfect human.

This retaining wall is designed to withstand earthquakes.