a boundary separating two countries or areas 边界线 ■(figurative)a division between two distinct or opposite things (喻)分界线 the borderline between ritual and custom. 礼节和风俗之间的分界线。
adjective
only just acceptable in quality or as belonging to a category 不大合乎标准的,边缘的,含混不清的,不确定的 references may be requested in borderline cases. 当遇到不确定的案例时可要求证明材料。