结果表明，重污染区集中在长江、黄河流域的粮、棉产区，而且我国农业环境中BHC、DDT污染程度是向南或向北逐渐减弱。
The extent of pollution by BHC and DDT in agricultural environment gradually decreases toward the northern and southern parts of China.
中央储备粮在调剂丰歉余缺…等方面发挥着十分重要的作用。
Central Grain Reserve plays a very important role in areas such as regulating in cases of crop failures, adjusting surplus and deficiency...
河西地区是甘肃省重要的农业生产基地，全国十二大商品粮基地之一，在大西北开发和建设中具有十分重要的地位。
Hexi Corridor plays a very import part in the national economy of Gansu Province. It is the main agricultural production base of Gansu and it is one of the 12 commodity food grain bases in China.
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