BookSales类型包含有关书的信息，并且包含书的销售数量和售价。
A BookSales type contains information about a book, and includes the number of books sold and the price at which they were sold.
BookSales类型包含有关书的信息，并且包含书的销售数量和售价。
A BookSales type contains information about a book, and includes the number of books sold and the price at which they were sold.
应用推荐