n. 硅铁锰钙石
[网络] 磷铁锰钙石

Supermassive Black Holes 超大质量黑洞 - 8

In every galaxy scientists looked at, they found evidence for a supermassive black hole. NGC 3115 NGC 3377 NGC 3379 In M31 and M32 In total there is probably 20-30 or so black holes that have been fou

发表于:2018-12-07 / 阅读(318) / 评论(0)

超大质量黑洞

Satellite Navigation Systems

NB: This is not a word for word transcript Alice: Hello, I'm Alice. Stephen: And I'm Stephen. Alice: And this is 6 Minute English! This week were talking about sat navs. Stephen: Sat navs thats short for satellite navigation systems. Alice: Theyre th

发表于:2019-01-07 / 阅读(89) / 评论(0)

六分钟英语

美国国家公共电台 NPR A Crash Course In Vermont's Head-Turning, Homegrown Sport

MICHEL MARTIN, HOST: Tomorrow, dozens of competitors will take to the slopes at Mount Snow in Vermont for the annual world championship of jack jumping. No judgment - we never heard of it either. So Vermont Public Radio's Nina Keck went to find out w

发表于:2019-01-16 / 阅读(42) / 评论(0)

2018年NPR美国国家公共电台3月

闲谈英语-Favorite Music(1)

A: What type of music do you like to listen to? B: I like listening to different kinds of music. A: Like what, for instance? B: I enjoy Rock and RB. A: Why is that? B: I like the different instruments that they use. A: That's a good reason to like so

发表于:2019-01-20 / 阅读(103) / 评论(0)

英语闲谈

美国国家公共电台 NPR Bill Of The Month: $43,208 For Repeat Surgery To Replace Broken Medical Device

DAVID GREENE, HOST: So here's a question - what do you do when a medical device fails? And when it fails, who pays for it - the manufacturer, the hospital? Or are you stuck with the bill? Well, Dr. Elisabeth Rosenthal from our partner Kaiser Health N

发表于:2019-01-23 / 阅读(34) / 评论(0)

2018年NPR美国国家公共电台12月

VOA常速英语2007年-UN Study Finds Nairobi Dumpsite Endangers Child

By Cathy Majtenyi Nairobi, Kenya 06 December 2007 Kenya's capital, Nairobi, is home to one of Africa's largest dumpsites. A recent United Nations study found that nearly half of the children surveyed who live near the dumpsite suffer from serious med

发表于:2019-02-07 / 阅读(89) / 评论(0)

VOA常速英语2007年（十二月）

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学英语单词

5,5-diethylbarbituric acid

alveolar echinococcosis

anchor is atrip

antagonizer

apparent polar-wander curve

Appear.

athrist