public Naicha(BrandBase brand, SkuBase sku) : base(brand, sku) { Name = "奶茶"; Price = 8; }
public Drink(BrandBase brand, SkuBase sku) { this._brand = brand; this._sku = sku; }
public Kafei(BrandBase brand, SkuBase sku) : base(brand, sku) { Name = "咖啡"; Price = 12; }