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Sara needed to see the doctor. She had an upset stomach. She felt bloated, and needed to pass gas every minute or so. This was terrible. She couldnt go anywhere in public. Her friends told her it was because she had moved to America. The air, water,

发表于:2018-12-06 / 阅读(94) / 评论(0)

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This is Scientific American's 60-Second Science. I'm Steve Mirsky. Got a minute? The ability to digest milk as adults, and as infants, actually, is due to the expression of an enzyme called lactase. That's the University of Pennsylvania's Sarah Tishk

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This is Scientific American 60 Seconds. I'm Cynthia Graber. This'll just take a minute. In Europe and the near east, people went from being mobile hunter gathers to more settled agriculture way of life. But in Africa, no matters domesticated animals

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发表于:2018-12-24 / 阅读(96) / 评论(0)

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8种被误认为素食的食物，你吃的真的是素吗?

8 Foods You'll Be Surprised To Learn Aret't Always Vegan 8种常被误认为素食的食物 We live in a very vegan-friendly food world these days. Even Ben Jerry's has put out a couple of vegan flavors. Unfortunately, not all foods are so nice. 近来

发表于:2019-01-03 / 阅读(167) / 评论(0)

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At the same time, methanogens can use hydrogen and carbon dioxide produced by other bacteria to generate methane, 同时，产甲烷菌可以使用其他细菌产出的氢和二氧化碳以生成甲烷， which can reduce the total volume of gas by u

发表于:2019-01-17 / 阅读(102) / 评论(0)

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英语听力文摘 English Digest 64、不易消化牛奶怎么办?

you shouldnt quit drinking milk. It is a good source of calcium after all.what you should do is stop consuming dairy on an empty stomach period. On an empty stomach, dairy moves faster through your intestines and is more likely to cause you intoleran

发表于:2019-01-26 / 阅读(73) / 评论(0)

英语听力文摘 English Digest

China steps up probe into contaminated drug capsules

BEIJING, April 21 (Xinhua) -- More inspection teams have been sent to investigate the incident of contaminated drug capsules and find out those held responsible, said the State Food and Drug Administration (SFDA) Saturday. Inspection teams from sever

发表于:2019-02-17 / 阅读(106) / 评论(0)

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