Anything in the stomach that affects the normal acidity and digestive processes, ranging from infections to acid reflux medicine to aging, may also interfere with B12 absorption, studies suggest.

研究表明，胃中任何影响正常酸度和消化过程的东西，从感染到倒酸药物再到衰老，都可能影响维生素b12的吸收。

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Methods 70 cases pregnant women (pregnant age ranging from 13 to 40 weeks) were examined by color Doppler ultrasound to measure the umbilical artery blood flow quantities of the normal foetuses.

方法应用彩色多普勒超声检测70例孕妇（孕13～40周）的正常胎儿的脐动脉血流量。

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Customers have confidence in Bock compressor technology in domains ranging from deep-freezing to normal refrigeration and air conditioning for buildings.

无论在低温冷冻，普通制冷还是建筑物空调领域，客户都非常信赖我们的压缩机技术。

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Looking at firefighter heart attack deaths nationwide over a decade, the researchers found that the risk of heart attack is highest when firefighters are working at a fire scene with increased odds ranging from 10 to 100 times the normal risk of heart attack.

MSN: Firefighters' heart attack risk soars at the scene

All had been arrested in the preceding 24 hours or so, on charges ranging from theft to deception to criminal damage - a normal cross-section of offences, along with other "street crimes" for this court to deal with during more regular office hours.

BBC: Curtain rises on late night justice

In this column, we'll discuss many aspects of healthy living and answer a wide variety of questions -- ranging from when it's safe to fly with an infant to whether it's normal for adults to get ear infections and how to make the most of your medical visits.

CNN: Learn to live well with CNNhealth