If your body produces too little lactose, the unprocessed lactose feeds bacteria in the lower gut, causing pain, bloating, flatulence and diarrhoea (more information at allergyuk.org).

如果你身体产生的乳糖酶过少，未经处理的乳糖给腹部中的细菌提供养份，从而产生腹痛、腹胀及腹泻(更多信息可访问allergyuk.org)。

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Those with higher levels of para-cresol sulphate, made from para-cresol produced by bacteria in the gut, metabolised paracetamol less effectively than those with lower levels.

肠道细菌产生对甲酚，对甲酚又形成硫酸对甲酚。尿中含有高水平硫酸对甲酚的人比含低水平硫酸对甲酚人代谢对乙酰氨基酚慢。

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Previous studies have shown that whole grains can boost bone mineral density, lower blood pressure, promote healthy gut bacteria and reduce the risk of diabetes.

早前有研究表明，粗粮可以增加骨密度、降低血压、营养有益健康的肠道微生物并且降低罹患糖尿病的风险。

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Here we see that the overall decrease is much lower, with the non-PCV7 bacteria taking up a lot of the slack left by the bacteria that were vanquished by the vaccine.

FORBES: A Vaccine Eliminated A Deadly Killer Of Infants. So Why Do Some People Fear It?

The 42-year-old secretary and mother of three in Chandler, Arizona, had developed a nasty intestinal infection, the kind that sometimes occurs when antibiotics kill your body's good bacteria along with the bad and lower your defenses to other invaders.

CNN: Best cure for stomach troubles-- which probiotics work and why