单词：vasa mucosa
马氏管
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Lesson 27 The 'Vasa' 瓦萨号 First listen and then answer the following question. 听录音，然后回答以下问题。 What happened to the 'Vasa' almost immediately after she was launched? From the seventeenth-century empire of Sweden, the story
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Curiosity Rover Bound for Mars The newest of NASA's Mars rovers is set to launch from Cape Canaveral, Florida, on Saturday, November 26 and reach the Red Planet in August 2012. It's called the Mars Science Laboratory, MSL for short, or 'Curiosity' to
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Voice is generated by a complex and beautiful biological system, and this is a system that allows all of us to communicate messages, concepts, and emotions. 声音是由负责、美丽的器官系统产生的，该系统可以让我们交流信息、想
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