frontier: n.1.边疆；边界，边缘。2.新开辟地，边地；〔美国〕边疆城市。3.〔常 pl.〕(知识等的)尚待开发的领域。短语和例子the frontiers of medicine [science] 医学[科学]新领域。adj.1.边疆的。2.新垦地的，边地的。短语和例子frontier guards 边防战士。 a frontier town 边疆城市。
One example is the setting up of six automatic weather stations awss on offshore islands . these stations served as frontier posts to monitor inclement weather moving in from the south china sea and contributed significantly to the weather warning services in the region 其中一例是在离岸的外岛上合作建立六个自动气象站，作为监测南海移来的恶劣天气的前哨站，为天气预警发挥极大作用。
