平原[尤指羅馬近郊]
Campagna \Cam*pa"gna\, n. [It. See {Campaing}.] An open level tract of country; especially ``Campagna di Roma.'' The extensive undulating plain which surrounds Rome. Note: Its length is commonly stated to be about ninety miles, and its breadth from twenty-seven to forty miles. The ground is almost entirely volcanic, and vapors which arise from the district produce malaria.