一位报导科学新闻的记者说，由于奇怪的地质变化，英国各地区的重力减小了。
A scientific correspondent reported that strange geological changes had resulted in weaker gravity in different parts of Britain.
本文介绍了唐山大地震前在北京通县西集地震台用扭秤观测到的重力位二次微商变化。
In this paper the secondary derivitative change of gravitational potential before Tangshan earthquake observed in Xiji seismic station near Beijing is presented.
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