一、单复数区别
1、at a very good price 形容的对象为单数或不可数名词。
例句：We have sweaters at a very good price.
我们以优惠价格出售毛衣。
2、at very good prices 形容的对象为复数或不可数名词。
例句：We sell all our clothes at very good prices.
我们以非常优惠的价格卖我们所有的衣服。
二、词义不同
1、at a very good price 形容一个合适的价格。
例句：We can buy some nice clothes at a very good price.
我们可以以优惠的价格买几件质量好的衣服。
2、at very good prices 形容整个的价格都很合适。
例句：We sell all our clothes at very good prices.
我们卖的所有服装价格都很优惠。
三、语境不同
1、at a very good price 多用于批量购买。
例句：We can buy some nice clothes at a very good price.
我们可以以优惠的价格买几件质量好的衣服。
2、at very good prices 多用于单个购买，整体中的每个。
例句：We are in a very good position to supply most grades of canned fish at
competitive pricesand for good delivery.
我们完全有能力以最具有竞争性的价格提供各种鱼类罐头。
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