expressiveness       
noun [ U ] uk/ɪkˈspres.ɪv.nəs/ us/ɪkˈspres.ɪv.nəs/
 表现力
the state of showing what someone thinks or feels
  The expressiveness of his eyes is remarkable.  他眼睛的表现力是非凡的。 
 Her voice is remarkable for its purity and emotional expressiveness. 她的声音以其纯净和强烈的情感表现力而著称。 
 See: expressive
 - More examples
 - Slang develops among associates for purposes of expressiveness.
 - He is a man of adamant views and expressiveness.
 - People remarked on the expressiveness of her face and hands.