边界

boundary（指界线）;border（指地区）;frontier
国家～（国界）national boundary/已定～defined (or demarcated)boundary/未定～undefined (or undemarcated)boundary/几何学～geometrical boundary/天文学～ astronomical boundary/人为～artificial boundary/自然～natural boundary/～的勘察boundary survey/～的确定determination of the boundary/～的划定delimitation of the boundary/～的标定demarcation of the boundary/～的标绘delineation of the boundary/～的走向alignment of the boundary line /～标志boundary sign (or mark,marker)/～测绘boundary survey and drawing/～海湾boundary bay/～海峡boundary strait /～联合检查joint inspection of the boundary /～联合委员会Joint Boundary Inspection Committee/～内陆海boundary land-locked sea /～实际控制线line of actual control on the border /～谈判boundary negotiations/～条约boundary treaty/～委员会boundary commission/～问题boundary question (or issue)/～协定boundary agreement/～议定书boundary protocol/～争端boundary dispute