Seizai is my best friend.

Saito is my best friend.

According to the law on specified alien species, the import of certain organisms is prohibited.

A terrestrial planet may have an environment similar to Earth.

These two software have complete interchangeability.

He works at the Ministry of Health, Labour and Welfare.

He is a very quiet person.

There are a few problems.

Special relativity is one of the fundamental theories of physics.

This software has forward compatibility.