图片展示了我已售完的套件的情况，我留了一套以便今后作对比或参考。
The photo shown here is the kit set that I had sold out, I keep 1 set just for future comparison or reference.
音乐会的票已售完，再说，聚在广场上的人也大都买不起票。
The concert was sold out, and in any case, most of the people gathered in the square could not afford the price of a ticket.
举个更实际的例子。下面的代码段显示在商品脱销的时候，我们如何在商品名旁边输出信息“(已售完！)”
As a more practical example, the below snippet demonstrates how we could output a "(out of stock!)" message next to our product name if the product is out of stock.
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