Until recently, McGee said, scientific focus on cooking was always on safety, hygiene, and industrial manufacturing.

麦克吉说，直到最近，科学对烹饪的关注总是集中在安全、卫生和工业生产上。

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Water quality safety directly affects the hygiene indexes of the products of all industrial fields and even the health of human being.

水质卫生指标的优劣，直接影响到许多行业产品的卫生质量，最终影响到人类自身的健康。

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