单词：non-polar double bond
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Callum: Hello, I'm Callum Robertson and this is Entertainment. st This week sees the release of the 21 Bond film, Casino Royale and it's the first film to star actor Daniel Craig as the British Secret Service spy 007. James Bond was the creation of
Entertainment
A new study has found that the Arctic's iconic polar bears are finding it harder to hunt for food due to melting sea ice caused by climate change, putting the species at a growing risk of extinction. Researchers from the United States Geological Surv
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Seventy-nine degrees north latitude is near the top, at the cold edge of the world. In the winter, when temperatures plunge below freezing, there is complete darkness at noon. During summer, the sun shines at midnight, there is no place to hide. Dang
国家地理2007年
BBC Learning English Weekender Polar Explorer Amber: Hello, I'm Amber, and youre listening to bbclearningenglish.com. In Weekender today, we listen to an interview with explorer, Rosie Stancer. In March, Rosie sets off on her latest expedition walki
Weekender
In English we have several names for the number zero (0). Sometimes we call it zero. Sometimes we call it nought. Sometimes we say O just like the letter O. James Bond was double o seven 007. In most cases, you can use any of these three zero, nought
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BEIJING, June 21 (Xinhua) -- China will launch a new icebreaker for use during an upcoming 2013 polar expedition, a senior oceanic official said on Tuesday. Both the new icebreaker and Xuelong (Snow Dragon), an icebreaker that operated in Antarctica,
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