Hisory has witnessed the phenomenon that there is an economic gap between the east and the west.

东西部地区的差距是我国长期存在着的历史现象。

youdao

Given Australia's difficult hisory of disastrous species introductions, you'd think some academics would slam the idea simply on the basis that you shouldn't do any more of them - and this was a point picked up by Prof Patricia Werner from the Australian National University (ANU).

BBC: Trumpets of outrage in the outback