The relationship between product category and product , on the other hand , is only optional in one direction 然而,在商品类别和商品之间的关系中,只是有一方是可选的。
Product category need not have products assigned to it , but all products must be assigned to a product category 一种商品类别不必有一样商品归属于它中(可选的) ,但所有的商品都必须分门别类。
A product category need not have products assigned to it , but all products must be assigned to a product category 一种商品类别不必有一样商品归属于它中(可选的) ,但所有的商品都必须分门别类。
The holiday rush caps a year that is expected to see global sales more than double from the year before , to some 30m , marking the emergence of a new mass - market category 这类产品的销量在圣诞节购物季达到最高潮,预计今年全球的销售额将比去年增长一倍以上,至3000万台左右,标志着一个新的大众商品类别就此出现。