I decided to send a reply to my friend using a postcard with a reply card attached.

In World War II, the Allies achieved victory.

This area is affected by multiple contamination.

The parasympathetic nervous system helps our body to relax and conserve energy.

Learning how to use compound verbs is important for understanding Japanese grammar.

Compound nouns are a very important part of Japanese grammar.

He is training his rectus abdominis muscle every day.

If you train your transverse abdominal muscle, your body balance will improve.

He is doing a special exercise to train his digastric muscle.

He never misses doing his gastrocnemius muscle stretches every day.