检查外包装的截止日期，以保证白脱牛奶是新鲜的。

Check the expiration date on the package to ensure that the buttermilk is fresh.

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牛油放到搅拌盆里，加入100克砂糖，鸡蛋，白脱牛奶和香草糖，搅拌完全混合。

Cream the butter and 100 grams of sugar, add in egg, buttermilk and vanilla sugar, combine till well mixed.

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沃特斯和同事们组成的一支大团队在3月25日的《科学》上描述了这些人工制品，他们给它们起了个绰号，叫做白脱牛奶小溪的复合品。

Waters and a large team of colleagues describe the collection of artifacts, dubbed the Buttermilk Creek Complex, in the March 25 Science.

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白脱牛奶小溪复合品可以追溯到13200 至15500年前，它们为尚不充分但一直在增加之中的克洛维斯之前的历史地点增加了一员。

The Buttermilk creek complex, which dates to between 13,200 and 15,500 years ago, adds to this scant but growing roster of pre-Clovis sites.

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白脱牛奶小溪复合品可以追溯到13200 至15500年前，它们为尚不充分但一直在增加之中的克洛维斯之前的历史地点增加了一员。

The Buttermilk creek complex, which dates to between 13,200 and 15,500 years ago, adds to this scant but growing roster of pre-Clovis sites.

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