He is very good at understanding spoken Japanese.

What does this proverb interpretation mean?

It is difficult to find the optimal solution to this problem.

He acted according to my instructions one by one.

His variety of pitches is very diverse, which troubles the batters.

This seedless grape is very sweet.

Tanemaru is my best friend.

He obtained a third-class driver's license.

My favorite dog breed is the Siberian Husky.

This bird is a subspecies that only inhabits specific regions.