Sumer is one of the ancient civilizations.

We will use ethanol in this experiment.

We need to install a new bow.

He crosses the river by boat every day.

Gaborone is the capital of Botswana.

His words were sharp like vitriol, piercing the heart.

This plant is growing under the influence of auxin.

This computer system uses parity checks to ensure data consistency.

Protease is a type of enzyme that breaks down proteins.

When the earthquake occurred, we immediately evacuated to the nearest shelter.