据美联社东京1978年5月31日电,一位政府专家在星期三说,日本已研制成功了世界上第一套探测大震震前微震活动的水下电缆系统。气象厅首席地震研究员田望对美联社说,他的研究室在最近五年为研制海底地震探测器已经花费了六百七十万美元。他说 According to the Associated Press Tokyo, May 31, 1978, a government expert said on Wednesday that Japan had successfully developed the world’s first underwater cable system to detect micro-seismic activities before the earthquake. Tian Wang, chief seismic researcher of the Department of Meteorology told AP that his lab has spent 6.7 million U.S. dollars to develop a seabed seismic detector in the past five years. He said