二次产业

例句：

1. 1.The second-hand market is booming in this area.
   这个地区的二手市场正在蓬勃发展。
2. 2.The company's secondary business is manufacturing electronics.
   该公司的次要业务是制造电子产品。
3. 3.The second-generation cars are more fuel-efficient than their predecessors.
   第二代汽车比它们的前辈更节能。