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参加中美地震预报重力研究计划的美国哥伦比亚大学莱蒙特地质观象台三人小组的工程师卡密其(Dennis Carmichael)最近在北京为本刊撰写了下面这篇短文,译载如下:
Dennis Carmichael, an engineer at the trio of Leighton Geological Observatory at Columbia University in the Sino-US earthquake prediction gravity research program, recently wrote the following essay for me in Beijing: