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通过电波调查在世界上首次观测到,日本列岛与中国大陆在地理上日益接近。日本邮政省通信综合研究所曾经正式宣布,茨城县鹿岛町与中国上海市的距离,由于地壳变动每年缩短2.9厘米。这是中日两国应用发自宇宙的电波进行的联合研究揭示的结果。中日两国使用鹿岛宇宙通信中心和上海市郊佘山观测站的电波天线进行观测,从1988年起在5年间进行了20次观测,结果发现,两个地点的距离为1875.92公里,通过5年的观测得知,每年平均缩2.9厘米。通信综合研究所同美国、德国和澳大利亚之间也在继续
The first observation by radio survey in the world is that the Japanese archipelago and the Chinese mainland are geographically closer and closer. The Japan Post and Telecommunications Institute for Integrated Communications officially announced that the distance between Kashima-cho, Ibaraki Prefecture and Shanghai, China, has been shortened by 2.9 centimeters per year due to changes in the crust. This is the result of a joint study conducted by China and Japan applying radio waves from the universe. China and Japan conducted observations using the radio-frequency antenna of Kashima Cosmic Communications Center and the Sheshan Observatory in the suburbs of Shanghai. From the observation of 20 observations in five years since 1988, they found that the distance between the two locations was 1875.92 kilometers and that they passed the five-year Observations show that the average annual contraction of 2.9 cm. The Institute for Integrated Communications also continues with the United States, Germany and Australia