When we sleep, for example, the saliva stream slows, and sulfur producing bacteria gain the upper hand, producing classic "morning breath".

例如，当我们睡觉时，唾液流变慢，产生硫的细菌占上风，便会产生典型的“晨起口臭”。

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Lactic acid-producing bacteria play a key role in the production of fermented foods and beverages, accounting for tens of billions of dollars in sales annually.

乳酸菌在食品和饮料的发酵生产过程中起着重要的作用，每年可带来数百亿美元的市场销售额。

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A microscope photo of the methane-producing bacteria.

显微镜照片，产甲烷细菌。

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One surprising finding, Dr. Hazen said, was how long-term dietary patterns affected the amount of TMAO-producing bacteria in the gut and thus magnified the risk.

WSJ: New Health Culprit Carnitine Found in Red Meat

One surprising finding, Dr. Hazen said, was how a long-term diet that includes meat affected the amount of TMAO-producing bacteria in the gut and thus magnified the risk.

WSJ: New Health Culprit Carnitine Found in Red Meat

It was bacteria, producing oxygen as a waste product.

NEWYORKER: The Miner��s Daughter