Here's why: the ambient bacteria floating around in the air can land on your food, "and can go from one to one million in a matter of hours," Draeger says.

原因：空气中悬浮的室温生细菌会落在你的食物上，“并且一个细菌能在几小时内增殖为百万个，”Draeger说。

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Store everything in plastic bags, even in the crisper, says Jean Draeger, nutrition educator with the University of Wisconsin Extension in Waukesha County, Wis.

把所有的东西都放在塑料袋中，甚至放在保险储藏格中，威斯康星大学营养培训师Jean Draeger说。

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Draeger sampling tubes and systems High precision guaranteed: The Draeger sampling tubes and systems are very reliable in use even with complex compounds and mixtures of substances.

采样管及其系统常被使用于证明和测量复杂混合物所含的物质，或几种非常相似的物质同时存在的地方。

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The device, made by Hemel Hempstead firm Draeger, was subjected to quality tests by the department's centre for applied science and technology before approval.

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Some colleges are raising the bar to qualify for both need- and merit-based scholarships, a trend that will likely continue next academic year, Mr. Draeger said.

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"If Congress doesn't come through, students and parents are going to be left in the lurch, " says Justin Draeger, president of the National Association of Student Financial Aid Administrators.

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