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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