A local woman measures the growth of a corn stalk in a greenhouse in Johnston, Iowa, United States, Feb 9. According to relevant statistics, the state ranks first in corn and soybean production in US. REUTERS/Brian C Frank

一名當?shù)貗D女正在一個溫室里測量玉米桿的生長情況。據(jù)統(tǒng)計，艾奧瓦州的玉米和大豆產(chǎn)量在美國排第一。美國艾奧瓦州，約翰斯頓，2月9日。路透社/Brian C Frank 拍攝

Iowa is well-known for its caucuses. Iowa caucus goers gather at the UNI Dome on the campus of the University of Northern Iowa in Cedar Falls, Iowa, Jan 3. REUTERS/Jeff Haynes

艾奧瓦州以其選民小組會議著名。參加會議的人們聚集在北艾奧瓦大學，美國艾奧瓦州，錫達福爾斯，1月3日。路透社/Brian C Frank 拍攝

Host Feng Xin invites three guests to join her, discussing why Chinese Vice-President Xi Jinping chose to visit Iowa and what Chinese and American people think of each other in Beijing, Feb 7.

主持人馮欣邀請三位嘉賓一起探討：習近平副主席選擇訪問艾奧瓦州的目的，以及中美兩國民眾如何看對方，北京，2月7日。