互补 dna 克隆化

小学英语深圳双语版六年级上UNIT5

00:05.00]5 有用的东西 [00:10.00]A What things do Mary and Peter need to lay the tables? [00:16.78]Mary和Peter要摆什么在桌子上？ [00:23.56]Mary needs some knives and forks. [00:27.83]Mary要摆一些刀子和叉子。 [00:32.10]She also needs some plates. [00:3

发表于:2018-12-13 / 阅读(88) / 评论(0)

小学英语深圳双语版六年级

Day-Old Mice Grow Back New Heart Tissue After Injury

When humans have a heart attack, heart muscles die after being cut off from their blood supply. But what if the heart could grow new muscle to replace the dead tissue? Some amphibians can regrow body parts, even entire limbs. But humans and other hig

发表于:2018-12-16 / 阅读(214) / 评论(0)

VOA标准英语2011年(三月)

VOA标准英语2012--Scientists Regrow Tissue Killed During Heart Attack

Scientists Regrow Tissue Killed During Heart Attack U.S. scientists have done what was once considered science fiction - regrown heart muscle to replace tissue that was killed off in a heart attack. It's the latest advance in the field of regenerativ

发表于:2019-01-14 / 阅读(54) / 评论(0)

VOA标准英语2012年(二月)

VOA标准英语2010年-Blood Vessel Disease Linked to Dementi

Researchers have identified a link between dementia and the brain damage that can occur in older people with high blood pressure and other forms of cardiovascular disease. High blood pressure, high cholesterol, and other conditions that affect blood

发表于:2019-01-14 / 阅读(69) / 评论(0)

VOA标准英语2010年(十一)月

60秒科学:Beating Heart Tissue from Stem Cells

Beating Heart Tissue from Stem Cells In a study in the journal Science, researchers explain how they used mouse embryonic stem cells and microchip technology to create heart muscle tissue that actually beats. Cynthia Graber reports One of the goals o

发表于:2019-01-30 / 阅读(82) / 评论(0)

60秒科学

Style Network host Giuliana Rancic has breast cancer

BEIJING, Oct. 18 (Xinhuanet) -- Giuliana Rancic, 37-year-old E! News and Style Network host, revealed Monday that she has breast cancer after doctors discovered a tumor during her latest round of in-vitro fertilization. Rancic had planned to wait unt

发表于:2019-02-17 / 阅读(84) / 评论(0)

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adaptive capacity to environment