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(MA) These days we take for granted the wide variety of music available on the radio. But, this wasn't always the case. In the early days of radio, stations were capable of broadcasting only a narrow range of sounds, which was all right for the huma
On January 11, Norway became the first country to begin turning off signals from its FM radio network. The Norwegian stations will instead use only digital audio broadcasting, called DAB. FM, or frequency modulation, radio stations have been in opera
Communication in and around the Haitian capital Port-au-Prince is at a standstill after Tuesday's devastating earthquake. With cell phone service and landlines down, Haitians around the world are seeking out any means possible to reach their families
模仿句子:Now there's long been talk about peak oil, the point of which the amount of hydrocarbons available to us starts an inexorable downward decline. 翻译:很久前人们就提到过石油峰值,即在达到某一峰值时,可供我们
population 母体 sample 样本 census 普查 sampling 抽样 quantitative 量的 qualitative/categorical 质的 discrete 离散的 continuous 连续的 population parameters 母体参数 sample statistics 样本统计量 descriptive statistics 叙述统