单词:cactinomycin c
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[00:00.00]Man Is Altering the Balance of Nature [00:05.68]The balance of nature is a very elaborate [00:09.66]and very delicate system of checks and counterchecks. [00:13.60]It is continually being altered as climates change, [00:16.66]as new organis
Millions More Children to Receive Vaccines More than one million children die each year from severe diarrhea and pneumococcal disease. Today (Tuesday), the GAVI Alliance announced an expanded campaign against the two leading killers of children world
快要到七夕了(Chinese Valentine's Day)。算一下,这是我们今年做的第三个情人节节目了。每次节目,我们都试着从不同角度分享实用、有趣的英语和文化给大家。今天,也不例外。听Jenny, Spencer告
not the how I spent my summer vacation story anybody would choose if they had a choice, but 17-year-old Kaleb Langdale didn't. The alligator that almost killed him four days ago wasn't asking for any opinions. The Florida teenager lost the lower half
13. It's easy to keep cacti. 仙人掌很好养活。 还能这样说: Cacti can be easily kept. It's not difficult to keep cacti alive. 应用解析: in bad keep 保存得不好; in good keep 保存得好; keep from 避开;禁止;隐瞒;
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HOST: Welcome to AMERICAN MOSAIC in VOA Special English. (MUSIC) I'm Doug Johnson. This week: We listen to music nominated for Country Music Awards Answer a listener question about Fannie Mae and Freddie Mac And report about efforts to protect a hug
Desert Diversity at Joshua Tree National Park 约书亚树国家公园:沙漠的多样性 This week on our national parks journey, we explore a unique place where two deserts meet. The hot, harsh, rocky landscape is home to a rare and strange-looki
US Scientists Expand Scope of HIV Vaccine Study The worlds largest ongoing HIV vaccine study has been expanded to consider multiple ways a vaccine might boost immune response to the AIDS virus. The U.S. Institute of Allergy and Infectious Diseases (N
由周迅监制、根据同名散文集改编的电影《陪安东尼度过漫长岁月》终于要在11月13日上映啦!作为《最小说》的大热作家,安东尼将从大学到工作,从国内到国外的真实生活感受记录在了这套
Broadcast on Coast to Coast: November 7, 2002 Rebroadcast on VOA News Now: November 10, 2002 AA: I'm Avi Arditti with Rosanne Skirble, and this week on WORDMASTER -- slang and idioms in American politics. RS: Tuesday was Election Day, and Slangman Da
1. Typical of the grassland dwellers of the continent is the American antelope, or pronghorn. 美洲羚羊,或称叉角羚,是该大陆典型的草原动物。 2. Of the millions who saw Haley's comet in 1986, how many people will live long enoug
By Jessica Berman Washington 11 May 2006 French researchers at the Sanofi Pasteur Institute say they have developed a bird flu vaccine that, so far, appears to be safe and effective in humans. But obs
Indoor air pollution is a common threat to human health, the new study looked at five common house plants and found that when it comes to removing harmful chemicals from the air, those five plants are better than others. 室内空气污染对人类健康
Todd: Simon, when you were younger, did you take vacations with your family? Simon: Yes, I did. Todd: OK, where did you go? Simon: Well, I went to many places, but I have one memorable experience. I went to Baja, California. Todd: Baja, California. N
1. Typical of the grassland dwellers of the continent is the American antelope, or pronghorn. 1.美洲羚羊,或称叉角羚,是该大陆典型的草原动物。 2. Of the millions who saw Haleys comet in 1986, how many people will live long enou
11. Acids are chemical compounds that, in water solution, have a sharp taste, a corrosive action on metals, and the ability to turn certain blue vegetable dyes red. 11. 酸是一种化合物,它在溶
1. Typical of the grassland dwellers of the continent is the American antelope, or pronghorn. 2. Of the millions who saw Haleys comet in 1986, how many people will live long enough to see it return in the twenty-first century. 3. Anthropologists