The inaccessibility of this remote region, now called Amazonia, meant that long-held theories about the early days of the river and surrounding forest were speculative at best.

• 而现在称为亚马逊流域的这个偏远地区难以进入，也意味著长期以来关于早期河流与周围森林的理论，顶多是靠推测的。