Petroleum is a non-renewable resource, and many oil fields are now getting depleted because of massive demand by consumers and industries that use fossil fuel products.

石油是一种非再生性资源，由于消费者和使用矿物燃料产品的工业的大量需求，许多油田即将枯竭。

As a non-renewable resource, the scarcity of radio spectrum becomes more and more serious with the rapid growth of wireless subscribers and the fast development of wireless services.

随着无线用户数目的快速增长和无线业务的蓬勃发展，无线频谱资源作为一种不可再生的资源，其稀缺特性表现的越来越明显。