Bacteria are extremely small living things. While we measure our own sizes in inches or centimeters, bacterial size is measured in microns. One micron is a thousandth of a millimeter: a pinhead is about a millimeter across. Rod-shaped bacteria are u

发表于:2018-11-28 / 阅读(446) / 评论(0) 分类 新概念优美背诵短文50篇

Bacteria are extremely small living things. While we measure our own sizes in inches or centimeters, bacterial size is measured in microns. One micron is a thousandth of a millimeter: a pinhead is abo

发表于:2018-12-01 / 阅读(159) / 评论(0) 分类 新东方背诵文选

Now the Special English Program American Stories. Our Story is called ''The Diamond Lens''. It was written by Fitz-James O'Brien. Today we will hear the second and final part of the story. Here is Maurice Joyce with part two of ''The Diamond Lens''.

发表于:2018-12-11 / 阅读(52) / 评论(0) 分类 美国故事

Now the Special English program, American stories. Our story today is called ''The Diamond Lens''. It was written by Fitz-James O'Brien. We will tell the story in two parts. Now here is Maurice Joyce with part one of ''The Diamond Lens''. When I was

发表于:2018-12-11 / 阅读(57) / 评论(0) 分类 美国故事

(MUSIC) Our story is called The Diamond Lens. It was written by Fitz-James O'Brien. Today we will hear the second and final part of the story. Here is Maurice Joyce with part two of The Diamond Lens. (MUSIC) Storyteller: When I was a child, someone

发表于:2018-12-11 / 阅读(46) / 评论(0) 分类 听美国故事练听力

AMERICAN STORIES - Short Story: The Diamond Lens by Fitz-James O'Brien (Part 2) Now, the Special English program, AMERICAN STORIES. (MUSIC) Our story is called The Diamond Lens. It was written by Fitz-James O'Brien. Today we will hear the second and

发表于:2018-12-16 / 阅读(72) / 评论(0) 分类 2011年VOA慢速英语(六)月

AS IT IS 2014-06-28 DIY Microscope Costs Only One Dollar 自制显微镜只需一美元 From VOA Learning English, this is As It Is. Today we hear about a recent development in microscope technology. Now, you might think this will be about a costly a

发表于:2018-12-16 / 阅读(48) / 评论(0) 分类 2014年VOA慢速英语(六)月

So over the past few centuries, microscopes have revolutionized our world. 过去的几个世纪,显微镜改变了世界。 They revealed to us a tiny world of objects, life and structures that are too small for us to see with our naked eyes. 它揭

发表于:2018-12-18 / 阅读(44) / 评论(0) 分类 TED演讲科技篇

Bacteria are extremely small living things. While we measure our own sizes in inches or centimeters, bacterial size is measured in microns. One micron is a thousandth of a millimeter: a pinhead is about a millimeter across. Rod-shaped bacteria are us

发表于:2018-12-30 / 阅读(52) / 评论(0) 分类 考研背诵50篇

(MUSIC) Our story is called The Diamond Lens. It was written by Fitz-James O'Brien. Today we will hear the second and final part of the story. Here is Maurice Joyce with part two of The Diamond Lens. (MUSIC) Storyteller: When I was a child, someone g

发表于:2019-01-01 / 阅读(150) / 评论(0) 分类 美国故事

Scientists Use Satellites to Identify Groundwater Losses in the Middle East From VOA Learning English, this is SCIENCE IN THE NEWS. Im Avi Arditti. And Im Faith Lapidus. Today we tell about a study of groundwater losses in the Middle East. We also te

发表于:2019-01-12 / 阅读(226) / 评论(0) 分类 2013年VOA慢速英语(五)月

AMERICAN STORIES - Short Story: The Diamond Lens, Part 1, by Fitz-James O'Brien SHIRLEY GRIFFITH: Now, the Special English program, AMERICAN STORIES. (MUSIC) Our story today is called The Diamond Lens. It was written by Fitz-James O'Brien. We will te

发表于:2019-01-12 / 阅读(97) / 评论(0) 分类 2011年VOA慢速英语(六)月

'The Diamond Lens' by Fitz-James O'Brien, Part One 《钻石透镜》by 菲茨詹姆斯奥布赖恩 Our story today is called The Diamond Lens. It was written by Fitz-James O'Brien. We will tell the story in two parts. Now, here is Maurice Joyce with

发表于:2019-01-12 / 阅读(57) / 评论(0) 分类 2016年VOA慢速英语(九)月

By Steve Schy Turin 24 February 2006 The International Olympic Committee has taken the unusual step of releasing the results of doping tests that were negative for drugs in the samples of 10 members o

发表于:2019-01-13 / 阅读(121) / 评论(0) 分类 2006年VOA标准英语(二月)

高清显微镜探索微型世界 Modern microelectronic devices contain billions of components crammed into thumbnail-size flakes. The chemical industry uses nanoparticles to make better cleaning products, while pharmaceutical companies use them for

发表于:2019-01-14 / 阅读(89) / 评论(0) 分类 VOA标准英语2016年(一月)

ROBERT SIEGEL, HOST: In a South Dakota courtroom, ABC News will defend a series of stories it reported five years ago in a defamation lawsuit. Jury selection started today. It's a trial that could prove to be a measure of public attitudes toward the

发表于:2019-01-17 / 阅读(56) / 评论(0) 分类 2017年NPR美国国家公共电台6月

When we ate something sweet, for example, the brain sent signals to our pancreas, which started producing insulin that stored the sugar molecules in our cells for energy. 举例来说,当我们吃了甜的东西,大脑会发送信号给胰腺开始

发表于:2019-01-20 / 阅读(51) / 评论(0) 分类 留美老师带你每日说英文

48 Bacteria Bacteria are extremely small living things. While we measure our own sizes in inches or centimeters, bacterial size is measured in microns. One micron is a thousandth of a millimeter: a pinhead is about a millimeter across. Rod-shaped bac

发表于:2019-02-17 / 阅读(66) / 评论(0) 分类 双语有声阅读

台湾籍旅美老师今天交给我们的句子是: Blood is the tissue that not only carries cells that transport oxygen, for example, the red blood cells, or fights infectious diseases, but it also carries messenger molecules, hormone-like facto

发表于:2019-03-05 / 阅读(104) / 评论(0) 分类 留美老师带你每日说英文

SPIM stands for Selective Plane Illumination Microscopy. SPIM is a new kind of microscope technology. It provides a significantly sharper image than current microscopes, and it also allows one to study living organisms without destroying or harming t

发表于:2019-03-06 / 阅读(116) / 评论(0) 分类 英语时差8,16