They had to clear rainforest areas to farm and built large underground reservoirs to store rainwater.

因为这需要在雨林地区清理出耕地，并建造大型地下水库来储存雨水。

Spread that across an entire industry, and you can understand that we accidentally build up a large reservoir of antibiotic-resistant bacteria.

这种现象在整个行业传播，这就难怪，我们无意之间建立了一个巨大的有耐药性病菌的储藏库。