noun🔗Share边境，边界。 The part of a country which borders or faces another country or unsettled region"The new school district's frontier stretches along the border with the neighboring state. "新学区的边界沿着与邻近州的州界延伸。geographynationareastatepoliticsChat with AIVocabulary GamePractice Reading
noun🔗Share前沿，尖端. The most advanced or recent version of something; leading edge."the frontier of civilization"文明的前沿technologyscienceindustrybusinessChat with AIVocabulary GamePractice Reading
noun🔗Share前沿阵地，前哨阵地 An outwork of a fortification."The castle's frontier walls were heavily fortified to protect the inner keep. "城堡的前沿阵地城墙经过了重重加固，以保护内部的中心堡垒。militaryarchitectureChat with AIVocabulary GamePractice Reading
verb🔗Share开拓，开辟。 To live as pioneers on frontier territory."The family decided to frontier a new town, hoping for a fresh start and more opportunities. "这家决定去开辟一座新城镇，希望能有一个新的开始和更多的机会。historysocietycultureactionChat with AIVocabulary GamePractice Reading
verb🔗Share戍守，使临边境。 To place on the frontier."The company decided to frontier their new product line to a more diverse customer base. "这家公司决定把他们的新产品线推向更多不同的客户群体。geographyareanationstateChat with AIVocabulary GamePractice Reading
