新东方优美背诵短文50篇 Unit48: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 bacteria are u

新东方背诵文选 L48 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 abo

神秘的月球 第13期

he people who, who work on the origin of life 今天研究地球生命来源的专家认为 on earth today seem to have come to the conclusion 海底的高热火山口 that the most likely place for life to have begun 是最可能开始出现生命的地

高中英语人教版高一下讲解07

[00:04.49]Part 1 [00:07.34]WARMING UP [01:34.41]biology=scientific study of the life and structure of plants and animals [01:52.98]the biology of bacteria biologist [02:04.94]biological washing powder [02:28.30]LISTENING [02:34.25]1. Listen to the ta

美国科学60秒 SSS 2015-01-08

This is scientific American 60 seconds science. I'm *, got a minute ?Genetically engineered bacteria already proves some products are commercial interests or biometical importance such as insulin. And coaxing the organism to do so can be done with a

SSS 2010-09-22

This is Scientific Americans 60-Second Science, Im Christopher Intagliata. Got a minute? Last month's salmonella outbreak got over 1,500 people sick. And one reason salmonella may be such a heavy hitter is that it actually hijacks our immune response

英语听力：自然百科 佛罗里达州的温泉（二）

The divers started in the ocean, but they are now within solid bedrock, 150 feet beneath someone's living room. They are now swimming in the water supply for the town above. Here they find, as they had hoped, life in the pitch darkness. These are hyd

世界节假日博览 第134期:清爽口气日

August the 6th is Fresh Breath Day. It is a day when we can think about our breath and how it affects our life and relationships. Bad breath is one of lifes most personal problems. It can make or break a romantic relationship and have an impact on ho

英语课程计划-Fresh Breath Day

August the 6th is Fresh Breath Day. It is a day when we can think about our breath and how it affects our life and relationships. Bad breath is one of lifes most personal problems. It can make or break a romantic relationship and have an impact on ho

英语听力文摘 English Digest 632 昆虫是如何对抗细菌和寄生虫的？

How Insects Fight Bacteria And Parasites Imagine that youre an insect, and that youve fallen ill because some bacteria or parasites have invaded your body. If you want to make it to a ripe old bug age, your body will need to fight off these invaders.

Horizon - Life On Mars 火星生命 - 9

The ground here is permafrost, a mixture of soil and ice frozen together. A group of Russian scientists have teamed up with NASA to drill down into it in search of microorganisms. It's work that's bee

Alien Neighbors 寻访外星人 9

He wears gloves and cleans his tools with alcohol to avoid contaminating the ancient salt samples with modern microorganisms.

VOA常速英语2008年-Antibiotic-Resistant Bacteria Poses Threat to P

By Ruth Reader Washington, DC 13 February 2008 There is growing concern around the world over illnesses caused by new antibiotic-resistant bacteria, or so-called superbugs, and the decreasing effectiveness of antibiotics to treat infections. Earlier

VOA慢速英语2011--Gut Bacteria: We Are What We Eat

HealthReport-GutBacteria:WeAreWhatWeEat This is the VOA Special English Health Report. The human digestive system is full of bacteria -- mostly good bacteria. These organisms help break down food so the body can use the nutrients. Scientists are expl

Experts: Let Produce Dry Out to Avoid Bacteria

Experts: Let Produce Dry Out to Avoid Bacteria American researchers say farmers should wait one day after a rain storm or watering their fields to harvest fresh fruits and vegetables. They say gathering the crops at least 24 hours after rainfall incr

英语听力：自然百科 已知的宇宙：外星生命 Alien_Contact-4

Water allows the sand grains to flow to gather and intermingle and form more complex structures. In the same way, water acts like a cocktail mixer, allowing the atoms and molecules to come together, and also may form the building blocks of life. All

英语听力：自然百科 行星旅行指南：火星 Mars—15

If we have been wet, then we want to look for nutrients and food sources that could support microbes. The water ice is proof of a valuable resource for any life forms still clinging(附着) beneath the surface and for future travelers. We now know th

Using bacteria to generate energy hopeful

BEIJING, May 24 (Xinhuanet) -- Scientists revealed for the first time the molecular structure of proteins, which enables bacteria to transfer electrical charges, according to a new study. The revelation was published in Proceedings of the National Ac

万物简史 第442期:小生物的世界(13)

A lot of little organisms that looked like bacteria and behaved like bacteria were actually something else altogether, 许多小生物看上去像细菌，表现得像细菌，实际上完全是另一类东西， something that had branched off from

万物简史 第435期:小生物的世界(6)

We now know that there are a lot of microbes living deep within the Earth, many of which have nothing at all to do with the organic world. 我们现在知道了，有大量微生物生活在地球内部的深处，其中许多与普通的有机世界毫