Since this continuance can be secured only by constant renewals, life is a self-renewing process. 约翰·杜威.民主与教育.
Morse had tried that at the very beginning of electrical application, in telegraphy, and all agreed that renewals of the experiment were at once costly and foolish. 弗兰克·刘易斯·戴尔.爱迪生的生平和发明.