Silver industry refers to the business sector that focuses on products and services for seniors， which ranges from housing and cosmetics to travel and entertainment.
银色产业（silver industry）指专注于做老年产品和服务的产业，业务涉及房产、护肤品、旅游以及娱乐等行业。
For example:
The massive demand of the gray sector will constitute an important factor in boosting economic growth, the firm forecast. It thus predicted an outstanding growth of the 'silver' industry, which caters to the tastes and needs of the elderly. (Source: Word Spy)
该公司预计，老年行业的巨大需求将成为促进经济增长的重要因素，并预言，满足老年人口味和需求的“银色”产业将有迅猛发展。
