Bismuth is one of the chemical elements, and its symbol is Bi.

After the fire, black smoke was hanging in the sky.

We will use cyanide in this chemical experiment.

The doctor provided him with life support treatment.

His father is currently receiving life support treatment.

Due to the fire, black smoke was billowing in the sky.

The exam is difficult, so I want to ask for a postponement.

Due to the fire, black smoke was billowing in the sky.

Black smoke was rising from the scene of the fire.

Pi is approximately 3.14.