[网络] 三甲基鸟苷

SSS 2011-06-22

This is Scientific Americans 60-Second Science. Im Cynthia Graber. This will just take a minute. Saliva contains many useful components: lubricants, enzymes for breaking down food and now compounds that can reveal a persons age. Thats according to a

发表于:2018-12-24 / 阅读(63) / 评论(0)

Scientific American(六)月

美语听力 English Café 474

Topics: How to Become a Dentist; The Guano Island Act; classic versus classical; to be there for (someone) versus to take (someone) there; after full deliberation Words: routine plaque diet anesthesia anatomy periodontics licensed birth defect natura

发表于:2018-12-26 / 阅读(34) / 评论(0)

美语听力 English Cafe

AGRICULTURE REPORT - Restrictions on Methyl Bromide

AGRICULTURE REPORT - Restrictions on Methyl Bromide By Mario Ritter Broadcast: Tuesday, March 16, 2004 This is Steve Ember with the VOA Special English Agriculture Report. Graphic Image Some chemicals

发表于:2019-01-06 / 阅读(83) / 评论(0)

农业与发展

英文特辑精选：Guano Apes - Rain

I'm alone can't wait until I feel your rain so unreal can't find another place of your rain I believe I still believe in your warm rain I'm alone can't sleep until I feel your rain How can I find Love, Faith and Trust inside of your rain so unreal, c

发表于:2019-01-10 / 阅读(34) / 评论(0)

英文特辑精选

美国国家公共电台 NPR The Next Pandemic Could Be Dripping On Your Head

DAVID GREENE, HOST: On the island of Borneo in Malaysia, there is a cave that tourists from all over the world love to come to visit. It is called Gomantong. But this cave, it turns out, has a secret. It could have all the elements needed to start a

发表于:2019-01-16 / 阅读(44) / 评论(0)

2017年NPR美国国家公共电台2月

经济学人69:外因遗传与压力新生儿蓝调曲

Science and Technology Epigenetics and stress Baby blues 科技外因遗传与压力新生儿蓝调曲 A mother's stress while she is pregnant can have a long-lasting effect on her children's genes 母亲孕期压力过大会对孩子的基因造成长

发表于:2019-01-26 / 阅读(58) / 评论(0)

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