He underwent surgery due to an injury to his extensor digitorum communis.

He is doing special exercises to strengthen his flexor digitorum superficialis.

He is doing special exercises to strengthen his flexor digitorum profundus.

He is doing a special exercise to strengthen his extensor indicis.

His cooking skills are among the top five.

The redback spider is a very dangerous spider native to Australia.

I saw an Australian white ibis in the park.

When you cross the International Date Line, the date changes by one day.

In learning Japanese grammar, understanding the upper two-step conjugation is important.

When learning Japanese grammar, it is important to understand verbs of the upper monograde conjugation.