This epidemic is spreading all over the world.

Japan's industry is famous worldwide.

I have been in a long-term association with him.

I couldn't understand his actions.

Mineral oil is often used in the manufacture of cosmetics and pharmaceuticals.

He is majoring in mineralogy at university.

A variety of species live in the temperate rainforest.

I got excited when I heard his voice.

The picnic was cancelled because the weather was not good.

Understanding data structures is important for improving programming skills.