My body can't keep up with the sudden change in temperature.

He was taken to the hospital because of dyspnea.

We are looking for a new supplier.

The emergency takeoff training has begun.

The calculation of the spherical angle is a part of geometry.

He conducted an experiment using a spherical lens.

He is suffering from poverty.

He is an old acquaintance.

He had a narrow escape in that accident.

He is playing the character of Kyu in the play.