释义 |
frontiers 基本Thesaurus 前沿 noun.boundary 同义词 borderland,borderline,bound,confines,edge,limit,march,perimeter,verge 反义词 center,inside,interior,middlemetropolisnoun.unexplored, unoccupied area of land 同义词 boondocks,outskirts,unknown,outback,backwoods,bush,hinterlandbackcountrybackwater,sticksboonies 反义词 metropolis |