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1984年11月17日，从天空飞来一个冰块，坠落于锡山市（原无锡县）梅村乡陈三房村的麦田里（“梅村坠冰”）．现场和有关部门调查排除了人为成因、气象成因以及来自飞机的可能性。坠冰样品的实验分析研究的初步结果表明，它跟地球物质有差别，与地外物质相似，这有利于该坠冰来自地外的看法，或许可能来自彗星。坠冰的深入研究对于揭示彗星性质、探讨水资源以及有关地质、气象、天文问题可能有重大意义。
On November 17, 1984, an ice cube came from the sky and crashed into the wheat field (“Umemura Falling Ice”) in Chen Sanfang Village, Mei Village, Xishan City (formerly Wuxi County). Site and relevant departments to investigate the exclusion of human causes, meteorological causes and the possibility of coming from the plane. Preliminary results of experimental studies of ice-falling samples suggest that it differs from the Earth’s material and is similar to extra-terrestrial material, which favors the idea that the ice falls from the outside, perhaps from comets. In-depth studies of ice fall may have significant implications for revealing the nature of comets, exploring water resources and related geological, meteorological and astronomical issues.