This is what scientists call a biogeographic boundary, the meeting point of two regions of biodiversity that are highly distinct.

这就科学家所说物地理学边界，也就高度不同物多样性区汇点。

The biogeographic line that he drew, which others would tweak in later years, didn't just reflect the proximity of the islands.

他所画物地理线，在未来日子里，其他人会对它进行调整，并不只反映了这些岛屿接近性。