To be a background character is to be both invisible and essential.
成为背景角色,既意味着默默无闻,又不可或缺。
The opening up of new markets, foreign or domestic, and the organizational development from the craft shop and factory to such concerns as U.S. Steel illustrate the same process of industrial mutation—if I may use that biological term—that incessantly revolutionizes the economic structure from within, incessantly destroying the old one, incessantly creating a new one.
In a rapidly changing market, only continuous learning and adaptation can maintain competitiveness.