areae①区, 区域②基面, 主面③翅室④面积⑤空地arean.面积；地区，地段；区域；领域area glandularis腺区area coordinates面积坐标area placentalis胎盘区area of faulting断层区area of fracture断口面积area reliability区域可靠度area composition区域合成area of interestn.关心的领域area of quadrant象限面积area of sections[机] 横断面积