That this tactic is morally, rather than academically, motivated is made very clear by the fact that there is no corresponding border region just above the class boundary;

这种措施是出于道德而不是学术的考虑，可以确定的事实是，在分数线以上并不存在这样类似的“边界区域”；

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However, the conceptual challenge explained above remains, where the site chosen for the overlook has a very similar view to the rest of the border of the crater.

然而，上面所提到的概念性的挑战依然存在，鸟瞰台所在位置的景色与火山口边缘的其它景色有着相似的视角。

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Built in the 13th century as a strategic building on the border with Poland, on an enormous rock above the Orava river.

公元13世纪，作为战略性建筑，奥拉瓦城堡建造于奥拉瓦河畔与波兰交界处的一个巨大岩石之上。

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The crash happened just before 5 p.m. on an above-ground track on the Red Line in the District of Columbia near the border with Takoma Park, Maryland.

CNN: Six killed in Washington-area Metro train collision