The Reverse Address Resolution Protocol is a protocol for obtaining host names from IP addresses.

The Great Eastern Japan Earthquake is one of the most damaging earthquakes in Japanese history.

My friend lives in Komsomolsk-na-Amure.

This job is a little more difficult than I thought.

My heart was healed by the beautiful scenery of Nara.

Learning Modern English is important for smooth international communication.

He wrote a sentence using a pronoun.

My grandfather was born in the 1900's.

Abstract algebra is a branch of mathematics that studies algebraic structures.

Abstract algebra is a field of mathematics that studies algebraic structures in an abstract way.