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NASA's Cassini Death Dives into Saturn, Ending Mission The spacecraft Cassini ended its 20-year mission on Friday with a final death dive into the planet Saturn. 卡西尼宇宙飞船周五最后一次冲向土星,结束了它20年的使命。 NASA
China builds first tower-type solar-thermal power station BEIJING, Nov. 12 (Xinhua) -- The first tower-type solar-thermal power station in Asia has been built in northwest Beijing, chief of the program said on Monday. Wang Zhifeng, a researcher at th
The Sentry autonomous underwater vehicle (AUV) aboard the research vessel Endeavor at the Deepwater Horizon oil spill site. A new report finds that the oil in the Gulf of Mexico still persists in the form of a massive plume that, according to scienti
Today a new geo-thermal power station was opened in Kawerau, in the eastern Bay of Plenty. Geo means earth and therm means heat. The power station uses hot steam from the earth. Like the geo-thermal power station at Wairakei, which opened in the 1950
I bought some pears at my local supermarket. At the checkout counter the cashier commented,
I bought some pears at my local supermarket. At the checkout counter the cashier commented, Oh, dear, I've charged you for plums instead of pears.What's the difference? I asked. Well, she said, plums are smaller and round.Notes: (1) pear n.梨(2) sup