没什么区别。breads是bread第三人称单数。
Breads：面包;面包类;印度烤饼
bread：n.面包;钱
例句：
Breakfast consisted of dry bread and a cup of tea.
早餐有无黄油的面包和一杯茶。
The smell of new bread floated up from the kitchen.
厨房里飘出新鲜面包的香味。
例句：
If the baker had a horse, he could sell his fine breads from one end of the kingdom to the other.
如果面包师有一匹马，那他就可以把他的面包销往全国各地了。
Either way, we know you will enjoy these great new breads.
无论哪种方式，我们知道你会享受这些新的伟大面包。
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