He was enveloped in melancholy.

At his concert, a medley of his hit songs was performed.

Carmeltazite is a very rare mineral, and its value exceeds that of diamonds.

In this experiment, we will use the polymerase chain reaction.

I purchased the goods in euros.

He climbed the tree using a rope.

I love eating lobster.

Topology is a branch of mathematics.

The download of this software is free.

I downloaded a new app.