unofficial market

例句：

1. 1.The unofficial market is a place where people can buy and sell goods without the official government approval.
   非官方市场是一个没有官方政府批准的地方，人们可以买卖商品。
2. 2.In the unofficial market, there are many small businesses that operate outside of the official regulations.
   在非官方市场上，有许多小企业运营在正式规定的外部。
3. 3.Many people prefer to shop in the unofficial market because it offers a wider range of products at lower prices.
   许多人更喜欢在非官方市场上购物，因为它提供了更广泛的产品选择，而且价格更低。