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以下是引用iamsleeping在2007-5-7 22:46:00的发言: Siege engines that is recovered from surrounds of Jerusalem areas are made from materials that is taken from local “Mastitade” trees which grows in arid area. However, dry arid areas have a higher radioactive-18 residue then less arid area. It is found that the radioactive 18 half life in the siege materials is not as high as current specimen. Hence it must be that the surrounding areas in the past was not as arid as the current condition. (What is the assumption based on )
1) Romans always build their siege engines from the materials that is easily obtained in areas nearby. 2) That the mastitia trees used for siege engines have the same.. qualities as .. in the past (bits missing).
选项1好像是在重复材料的第一句话。。。既然结论中涉及过去与现在的比较,我觉得选项2比较好。
in option 2) the important information " the same.. qualities as .. in the past " is missing here, that's why can't fully confirm 1) or 2) also, it is based on author's memory, it is may slightly different with what the real argument is. So I suggest pay attention to both 1) and 2) |