相关单词同义词boundary, border, borderline, 近义词 border 边界, limit 限度, outskirts 郊区, boundary 边界, edge 边缘, border line 图廓线, 边线..., front line 前线, circuit 巡回, suburb 郊区, terminal 末端, back country 穷乡僻壤, country 国家, back 后面, bounds 界限临近词frost, frontal, Frontiers, Frontiere, frontier tax, frontier set, frontier law, frontier man, frontiersmen, frontiersman, Frontier City, frontier area相似词frontal lobotomy, frontal system, frontalis, frontbencher, frontiersman, fronting, frontispiece, frontman, 返回 frontier