[ti:UNIT 2 DNA Lesson 13 Clones Are the Same] [0:00.788]UNIT 2 第二单元 [0:02.442]DNA [0:05.530]Lesson 13: 第13课： [0:07.106]Clones Are the Same 克隆人是一样的 [0:09.703]THINK ABOUT IT! 想一想！ [0:11.155] You have a pet that you l...
[ti:UNIT 2 DNA Lesson 11 Cloning People?] [0:01.064]UNIT 2 第二单元 [0:02.741]DNA [0:05.221]Lesson 11: 第11课： [0:06.710]Cloning People? 克隆人？ [0:09.887]What if scientists could make clones of human beings? 如果科学家能够克隆人...
[ti:UNIT 2 DNA Lesson 10 What Is DNA?] [0:02.300]UNIT 2 第二单元 [0:03.936]DNA [0:06.098]Lesson 10: 第10课： [0:07.918]What Is DNA? 什么是DNA？ [0:10.668]THINK ABOUT IT! 想一想！ [0:12.400] Do you and the students near you look the sam...
DNA Testing to Help Sharks Keep Fins In a study in the journal Endangered Species Research, shark fins on sale were shown to be from a specific region in which shark populations have collapsed, evidence that may help change fishing regulations. Cynth...
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给自己做一次DNA测试。扪心自问：我现在做的是什么决定，所采取的是什么行动？我为何要做这些决定？为何要采取这些行动？那些决定将会把我带到何处？那些行动将会引导我走向何方？它...
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DNA tests have positively identified the remains of two children of the last Russian czar, settling a mystery that had long surrounded their fate. VOA Moscow Correspondent Peter Fedynsky reports the memory of the murdered czarist family is still hon...
By David McAlary Washington 05 April 2007 Scientists have discovered a genetic reason why some dogs are small and others big. They say the finding has implications beyond canine size, since the work applies to the study of other complex genetic trait...
67 维生素C能否破坏DNA？ DATE=7-11-01 TITLE=SCIENCE REPORT - Vitamin C and DNA BYLINE=Nancy Steinbach (Start at 59") is is Bill White with the VOA Special English Science Report. Millions of Am...
