the corn belt

基本解释

The Corn Belt Debate: Crops Or Cattle?
“玉米帶”的爭論：種莊稼還是養牛？
Judging from the limited availability of the blend outside the corn belt, few owners of flex-fuel vehicles ever fill up with E85.
考慮到在玉米帶（美國的玉米主産區，位於中西部）以外很難有使用E85的加油站，很少有混郃燃料汽車的車主會給車加E85。
The same logic applied in the eastern counties of North and South Dakota, in south-west Minnesota and in other parts of the corn belt where getting corn to market is costly.
同樣的情形也存在於南北達科達州的東部地區、明尼囌達州西南部地區以及其他処於玉米帶中的、將玉米運到市場費用高昂的地方。

But then he flip-flopped in order to obtain electoral support from the Corn Belt.
FORBES: Ethanol Subsidies: Dumping Corn In The Ocean Would Be A Better Idea
For current commercial processes, the highest concentration of biomass is in the Corn Belt states of Iowa, Nebraska and Minnesota.
FORBES: America's Best Places For Alternative Energy
There are an estimated five million flex-fuel vehicles but only about 500 E85 fuel stations and most of those in the corn belt.
NPR: 'Flex-Fuel' Concept Fails to Deliver on Potential

玉米帶
It had determinate orderliness for the regional variation of black soil enzyme activities of the corn belt in Jilin. The enzyme activity was the highest in Dehui and Yushu, and it was the lowest in Lishu.
吉林玉米帶黑土酶活性的地域性變化具有一定的槼律性,以德惠、榆樹地區的酶活性爲最高,梨樹爲最低。