| 词汇 | frontier |
| 释义 | frontier 1 ENTRIES FOUND: frontier (noun) frontier /ˌfrʌnˈtiɚ/ Brit /ˈfrʌntɪə/ noun plural frontiers frontier /ˌfrʌnˈtiɚ/ Brit /ˈfrʌntɪə/ noun plural frontiers Learner's definition of FRONTIER [count] 1 : a border between two countries边境；国界 the frontier between Canada and the U.S.美加边境 2 : a distant area where few people live边疆；边远地区 They were sent on an expedition to explore the western frontier.他们被派往西部边疆探险。 frontier life边疆生活 3 : the limits of knowledge in a particular field（某领域知识的）前沿，尖端 — usually plural通常用复数 the frontiers of science科学前沿 a discovery at the very frontiers of our understanding在我们理解能力范围内的最新发现 |
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