frontier regionˈfrʌnˌtiəˈri:dʒən短语¹⁴⁴⁹⁷²⁺² 基本例句 边界地区 His achievements in consolidating the unity of the country and developing the frontier region have had profound historical significance. He is worthy of an indelible position in history. 杨廷理巩固国家统一、开发边疆的业绩产生了深远的历史影响,具有不可磨灭的历史地位。 cnki