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科学美国人60秒:英国伦敦渔业历史-托福听力下载

2017-01-19 14:01:00来源：科学美国人60秒

点击查看>>科学美国人60秒音频：英国伦敦渔业历史

　　科学美国人60秒中英文翻译：英国伦敦渔业历史

　　科学美国人60秒英文文本

　　Londoners love their fish.

　　And according to a new study, in the early 13th Century they suddenly started importing it from as far away as the Arctic near Norway.

　　The research is in the journal Antiquity.

　　About the year 1000, sea fishing increased significantly in northern Europe.

　　To see how that increase influenced urban growth, researchers looked at 95 excavation sites in London.

　　Which included about 3000 bones from cod fish.

　　伦敦渔业.jpg

　　Cod are decapitated before being dried for transport.

　　So finding heads meant the fish were local.

　　And the researchers found that as fish heads appear to decrease in the early 1200s, fish tails dramatically increased—a sign of importation.

　　Examination of the chemical isotopes in the tails matched those for fish in waters far to the north, probably off Norway close to the Arctic, more evidence of import.

　　The scientists do not know if the rapid switch from local to imported cod happened because local fish weren't as plentiful as the population increased, or if the market became flooded with dried imports from the north.

　　But these fish tails tell a story of London becoming a growing economic center, and part of a globalizing fish trade.

　　中文翻译请点击下一页

本文关键字: 科学美国人60秒 科学60秒下载 托福听力

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