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Accordng to AFP report, the finding suggest that Japans many language variants did not emerge. More broadly, the study bolsters the theory that agricultural expansion has been the main driver of linguistic diversity throughout world history, the news added.

据美联社报道，这个发现表明日本的许多语言变体原本并不存在。新闻还报道说，这个研究更广泛的意义在于，它支持了有关农业扩张是世界历史中语言多样化的主要来源的理论。

According to the researchers theroy, the migration of other peoples from mainland Asia around 200 B.C. brought metal tools, rice and new farming techniques but had scant impact on linguistic development.

根据研究人员的理论，在公元前200年左右，来自亚洲大陆的其他种族移民（为日本）带来了金属器具，大米，以及新的农业技术。但是在其语言发展方面却未能造成深远影响。

Computer modeling showed that all of these Japonic language descended from a common ancestor some 2,182 years ago, coinciding with the major wave of migration from the Korean Peninsula.

计算机模型表明，所有这些日本的语言都是由约2182年前的同一个祖先演化而来。而这正与当时朝鲜半岛移民的大潮相吻合。

The study, published in Proceedings of the Royal Society B, also highlights a remarkable, and possible unique, delay in the transition to argricultural cuture.

这份发表在英国皇家协会生物进展上的研究也突出强调了（日本）在向农业文明过渡过程中，一个显著的，或许也是独特的迟滞现象。