有帮助;有益;有用
Helpful \Help"ful\, a. Furnishing help; giving aid; assistant; useful; salutary. Heavens make our presence and our practices Pleasant and helpful to him! --Shak. -- {Help"ful*ly}, adv. -- {Help"ful*ness}, n. --Milton.
helpfulness n 1: the property of providing useful assistance 2: friendliness evidence by a kindly and helpful disposition [syn: {kindliness}]