Carbon-14 dating reveals that the megalithic monuments in Brittany are nearly 2000 years as old as any of their supposed Mediterranean predecessors. 解释是这样说的: Comparisons must be logical and easy to follow.The Brittany monuments are logically older than the Mediterranean ones. 我在考试的时候怎么知道B和M谁old???难到还要平时积累吗?