The mold begins in New York City on a map with very concentratedfood sources in the cities but few nutrients in the countryside.
模具开始就在食物来源非常集中城市的，但农村一些营养素地图来自纽约市。
2
There are unknowns in this too, such as the degree to which radioactivity will become concentrated in the food chain.
也还有一些未知影响在里面，像是放射物在食物链里的富集程度。
3
The current global food system worked well in a world of cheap, stable energy prices which allowed food to be grown in concentrated locations and transported over huge distances to meet demands.