例如，一个公司也许能够准确地估计它将销售的鞋子总数，但它可能不确定哪一种特定类型的鞋子将比其他类型的鞋子卖得更多。

For example, a company may be able to estimate accurately the aggregate number of shoes it will sell, but it may be uncertain about which specific types of shoes will sell more than other types.

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这东方特色的小毯子、这皮箱、这鞋子――它们都是她喜欢的类型。

The Oriental rug, the luggage, the shoes—they were exactly her style.

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每个木桶装一种不同类型的衣服——一个木桶装所有的鞋子；另一个装所有的裤子，另一个装所有的夹克，另一个装裙子。

Each bucket has a different type of clothing in it — one bucket contains all the shoes; another bucket contains all the pants; another has all the jackets; another the dresses.

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