甜豆、荷兰豆是豆科属，一年生攀缘草本植物，食用嫩荚。原产欧洲南部及地中海沿岸地区，其营养价值很高，属于高档细菜，在欧美国家种植普遍，我国在广东、广西、四川和云南等南方省市种植广泛。随着近几年的对外开放，搞活经济，北京地区开始逐年扩大种植面积。我们延庆... Sweet beans, Beans are legume genus, annual climbing herbs, eating soft pods. Native to southern Europe and the Mediterranean coast, its high nutritional value, belonging to high-grade fine vegetables, widespread in Europe and the United States, China in Guangdong, Guangxi, Sichuan and Yunnan and other southern provinces planted a wide range. With the opening up to the outside world and the revitalization of economy in recent years, Beijing has started to expand its planting area year by year. We Yanqing ...