Day after day, he continued to strive to solve the problem.

A terrestrial planet may have an environment similar to Earth.

Colonialism continued for a long time until many countries achieved independence.

This nutrient agar contains nutrients that help bacteria grow.

My hometown is a prefecture-level city.

It is said that a ghost is living in this old house.

They launched a surface-to-air missile.

Many large corporations are saving taxes by using tax havens.

Colonization is the process by which some countries dominate other countries or regions and impose their own culture and values.

Our company's headquarters is in Tokyo.