frontier

n. 邊界、邊境

國境

學術名詞

• 邊界：舞蹈、數學、資訊
• 邊疆：地理學
• 境界：測量學
• 邊界*：測量學
• 夫隆提爾：外國地名

英文釋義

1. a wilderness at the edge of a settled area of a country
2. an international boundary or the area (often fortified) immediately inside the boundary
3. an undeveloped field of study; a topic inviting research and development