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发表于:2018-12-02 / 阅读(61) / 评论(0) 分类 2015年NPR美国国家公共电台3月

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发表于:2018-12-17 / 阅读(35) / 评论(0) 分类 2015年NPR美国国家公共电台3月

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发表于:2018-12-17 / 阅读(49) / 评论(0) 分类 2015年NPR美国国家公共电台3月

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发表于:2018-12-17 / 阅读(69) / 评论(0) 分类 2015年NPR美国国家公共电台3月

[00:06.37]The United States has a new official clock. [00:10.95]The clock began operating late last year in the American city of Boulder,Colorado. [00:18.39]Experts say the new clock is so exact that it will neither gain nor lose so much as one secon

发表于:2018-12-26 / 阅读(61) / 评论(0) 分类 美国英语听力80篇

[00:05.20]Nikola Tesla developed the alternating current power system that provides electricity in the United States. [00:14.42]Many of his other discoveries led to electronic inventions for which other scientists were honored. [00:22.75]Mister Tesla

发表于:2018-12-26 / 阅读(77) / 评论(0) 分类 美国英语听力80篇

[00:04.31]Flooding is continuing for a third week in southern African countries. [00:11.31]:Strong rain and wind have destroyed houses, bridges and roads in South Africa, Botswana, Zimbabwe and Mozambique. [00:23.54]Crops have been destroyed, and tho

发表于:2018-12-26 / 阅读(97) / 评论(0) 分类 美国英语听力80篇

[00:06.48]Lack of Vitamin A is the leading cause of blindness among children in deveoping countries. [00:14.55]These children do not get enough Vitamin A in the food they eat. [00:21.11]In Africa,more than 3,000,000 children suffer from blindness or

发表于:2018-12-26 / 阅读(91) / 评论(0) 分类 美国英语听力80篇

[00:04.81]Many Americans desire to live in homes near coastal areas. [00:10.95]More than 3,000 people move to coastal areas every day. [00:16.74]But experts say one-fourth of the buildings along America's coastal areas may be damaged or destroyed by

发表于:2018-12-26 / 阅读(87) / 评论(0) 分类 美国英语听力80篇

[00:06.95]Last summer, Americans in the eastern state of New York were threatened by a disease never before seen in the country--West Nile Fever. [00:19.59]The disease usually is not serious in people. [00:23.61]But it can cause swelling of the brain

发表于:2018-12-26 / 阅读(121) / 评论(0) 分类 美国英语听力80篇

[00:17.11]Have you ever thought about what you would save from today to show to people in the future? [00:24.19]Some people are thinking about it. [00:27.35]They are involved in a project to save objects in a container that is not to be opened until

发表于:2018-12-26 / 阅读(112) / 评论(0) 分类 美国英语听力80篇

[00:04.83]Last month, delegates from more than one-hundred nations approved the first international treaty [00:12.54]about trade in products made by processes of genetic engineering. [00:18.00]Genetic engineering involves changing the genes of living

发表于:2018-12-26 / 阅读(95) / 评论(0) 分类 美国英语听力80篇