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New research has revealed how the iconic Leaning Tower of Pisa has managed to stay standing – and intact – in the face of four strong earthquakes and a precarious lean of five degrees. 意大利的标志性建筑比萨斜塔有5度的倾斜度，而且还历经4次大地震，却依然屹立不倒，完好无损，最新的研究揭开了这个谜底。 The vulnerability of the Unesco World Heritage Site has mystified engineers and scientists for millennia. Moderate seismic activity was expected to significantly damage the 58m tall Tower, or even result in collapse but, incredibly, this has not happened. 比萨斜塔高58米，被评为联合国教科文组织世界遗产。一千年来，比萨斜塔的脆弱性一直令工程师和科学家们困惑不已。按说，中度地震活动应该就能导致它严重受损甚至倒塌，但现实中这样的情形并未发生，令人不可思议。 | 
