concentrate in

基本解释

Industrial development is being concentrated in the west of the country.
工業開發正集中於國家的西部進行。
Moreover, the cases were not concentrated in the past, but spread across the decades up to the present.
此外，這些個案竝不衹是集中在過去，而是從過去到現在一直都存在。
China[font=Arial] is hoovering up ever more commodities not just because its economy is growing so quickly, but also because that growth is concentrated in industries that use lots of resources.
中國之所以吸納越來越多的資源商品，不僅是因爲經濟的快速增長，而且還因爲這種增長主要集中在消耗大量資源的工業領域。

It can become concentrated in small areas and then disappear.
I'm going to say, quite to the contrary, the positive charge is concentrated at the center in a tiny, tiny, tiny volume.
我要說的是，完全相反，正電荷集中在中心,在一個非常非常小的躰積內。
麻省理工公開課 - 固態化學導論課程節選
"Today,about 85 percent of the burden of chronic diseases is concentrated in low and middle income countries,".

Catellus' properties, scattered around the West but concentrated in California, include 315, 000 hectares of desert.
FORBES: Acreage plays