The European bitterling is known for its beautiful colors.

European eels can live in both fresh and salt water.

The European crucian carp is a type of freshwater fish and is reputed to be delicious.

He is said to have a sharp sixth sense.

He made a copy using a Xerox.

He xeroxed the important documents.

It's difficult to solve this hexagonal puzzle.

Mr. Rokkaku is my best friend.

He is doing special exercises to strengthen his intercostal muscles.

He is doing a special exercise to strengthen his internal intercostal muscles.