短语词组短語corn belt maize belt 玉米産區corn belt in jilin 吉林玉米帶corn belt climate 玉米帶氣候Golden Corn Belt 黃金玉米帶the corn belt 玉米帶;産玉米區jilin corn belt 吉林玉米帶Corn and Winter Wheat Belt 玉米鼕小麥帶 返回 corn belt