单词：thermal distribution of neutrons
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Stroll through the frozen foods section of the supermarket and youll find frozen corn, peas, and beans. A Moment of Science wonders, why isnt there any frozen lettuce? 你在闲逛超市的冷冻食品区的时候，会看到有冷冻玉米、冷冻豌
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This is the VOA Special English Agriculture Report. The search for new fuels has led some researchers to algae. Algae is a name for thousands of different organisms. They include single-celled plants as well as kelp and other large plants. Blue-gree
VOA慢速英语2008年（十二）月
This is the VOA Special English Agriculture Report. The search for new fuels has led some researchers to algae. Algae is a name for thousands of different organisms. They include single-celled plants as well as kelp and other large plants. Blue-gree
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This is the VOA Special English Development Report. Green roofs are designed to save energy and capture rainwater. Rooftops covered with plants help keep buildings cool. They can extend the life of a roof. And they can reduce water runoff into stree
VOA慢速英语2008（十）月
How To Save on Groceries By Growing Your Own Getting food from your own backyard can beat the supermarket any day, on both taste and price. Think thats too much work? Youd be surprised. You dont need to have a green thumb or a massive backyard to pla
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