[医] 硝化菌科

n usually rod-shaped bacteria that oxidize ammonia or nitrites: nitrobacteria

词型变化：名词复数形式 : nitrobacteriaceaes

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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(527) / 评论(0)

新概念优美背诵短文50篇

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麻省理工学院公开课：单变量微积分

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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

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VOA常速英语2008年（二月）

SSS 2010-03-10

You know how uncomfortable it feels when you really have to go to the bathroom? And you have to hold it in? If researchers get their way, disease-carrying mosquitoes will spend their last moments being that uncomfortable. Cornell University scientist

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英语对接游戏

2006年VOA标准英语-Does North Korea's Taepodong-2 Ballistic Missil

By Andre de Nesnera Washington 06 July 2006 Just a few days ago, North Korea triggered an international furor when it conducted several ballistic missile tests. In this report from Washington, VOA Senior Correspondent Andr de Nesnera looks at whethe

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2006年VOA标准英语（七月）

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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

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2011年VOA慢速英语(九)月

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

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2015年VOA慢速英语(七)月

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音乐咖啡厅

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AA: I'm Avi Arditti with Rosanne Skirble, and this week on Wordmaster we have part two of our look at proverbs in American English. RS: We continue our conversation with Wolfgang Mieder, a professor of German and folklore at the University of Vermont

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英语单词大师-Word Master

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AA: I'm Avi Arditti with Rosanne Skirble, and this week on Wordmaster: proverbs in American English. RS: It's tempting to call Wolfang Mieder the proverbial expert from out-of-town. A professor of German and folklore at the University of Vermont, he

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英语单词大师-Word Master

HEALTH REPORT - New Heart Drug Shows Promise in African Amer

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健康与经济

Using bacteria to generate energy hopeful

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英语新闻

Finnish Veteren soccer defender Hyypiae to retire

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英语新闻

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音乐咖啡厅

Chelsea beat FC Nordsjaelland 4-0 in Champions League

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Today we go on a journey. It starts in Sweden over 100 years ago; and then moves to London; and finally moves to future worlds and other planets. But we start in Sweden. Alfred Nobel spent his life finding ways to blow things up. He was born in 1833

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above threshold

absolute accuracy error