He always acts actively.

We need to measure the concentration of this liquid.

This procedure is very complicated.

He is a very shy person in real life.

A healthy sex life is important for overall health.

After the earthquake, we were forced to live in evacuation shelters.

His standard of living has improved significantly.

My cost of living is increasing every month.

He values his private life.

Studying the life cycle of this insect is very interesting.