Concerning the characteristics of respiratory function in swimmers.

Ambition is one of his characteristics.

What do you think are the racial traits of the Japanese?

One of the qualities of steel is hardness.

Soap has the property of removing dirt.

A dog is distinct from a cat in physical characteristics.

Pigs share certain characteristics with human beings.

One of the reasons Twitter is popular in Japan is a characteristic of Japanese itself: Japanese uses ideograms which enable it to convey more information in just 140 characters than other languages, not counting Chinese. Incidentally, the Japanese version of this sentence is written with exactly 140 characters. How many characters does it take in other languages?