单词:rotational stream surface
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Idiom: On all fours 爬行,人说话的方式非常卑微 Hit the book: Backpack Astronaut Armrest Overstuffed Fingertip Rotational
Why do golf balls have dimples(酒窝, 涟漪)?So that they look cute? NO! Because the dimples maximize the distance golf balls travel. Dimpled balls travel up to four times farther than smooth-surfac
China's first Mars voyager mission is expected to be launched around 2020 and reach the Red Planet a year or so later. The computer generated images unveiled by the Chinese State Administration of Science, Technology and Industry for National Defense
This is the VOA Special English Agriculture Report. Grasslands need time to rest when cattle and other animals feed on them. Moving animals from one area of pasture to another can provide the time needed for new growth. This is called rotational graz
SAN FRANCISCO, April 19 (Xinhua) -- YouTube announced Tuesday that the much-anticipated British royal(王室) wedding of Catherine Middleton and Prince William will be live streamed on the website' s live channel. Next Friday, the live stream will fo
奥巴马:美国不试图遏制中国 MANILA, April 28 (Xinhua) -- U.S. President Barack Obama said here on Monday that Washington was not trying to contain China when it signed a new military pact with the Philippines. The United States and the Phil