单词:mechanical flyball-type governor
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This is Scientific American's 60-Second Science. I'm Karen Hopkin. This will just take a minute. Beauty is only skin deep. And the beauty of shiny white teeth is even less deep. Because a new study shows that fluoride forms a thinner protective shiel
Topics: Famous Americans-Mel Blanc; American Presidents-William McKinley; to fill in versus to complete; telephone phrases used to tell someone you can't talk now; so long Words: role to hire voice-over animated coma to imitate seizure protective tax
Americans commemorate the heritage of African-Americans every February in what is known as African American History Month, yet little is known about the association that started the tradition and what it is doing now. James Stewart is the current pre
[00:07.37]Comparing cultures [00:09.71]Listen to a person talking about sports [00:11.96]in the USA and Britain and answer the questions [00:16.27]American football is one of the most popular [00:18.95]sports in the United States. [00:21.50]It's very
By Carol Pearson Washington, D.C. 05 July 2006 Watch Health Report Nutrition facts What you eat can determine how long you live. A recent report in the Journal of the American Heart Association recommends new diet and lifestyle choices for a longer
MEXICO CITY, May 9 (Xinhua) -- Mexico's national team holds on to its 20th spot as soccer's world governing body FIFA released the latest world rankings on Wednesday. Mexico, known as the Tricolor for its red, white and green flag-colored uniforms, c