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.

My child will enter the local elementary school next year.

My university is in Tokyo.