The paper pointed out Ordos and Alxa Plateau were pastoral area, Boundary of Song and Tangut, Hexi Corridor belonged to mixed pastoral-farming area, Ningxia Plain was fanning area.

指出了西夏具体的经济区划：鄂尔多斯、阿拉善高原为畜牧区，宋夏沿边、河西走廊为半农半牧区、宁夏平原为农耕区。

youdao

Typically, a mountain range will be the boundary between the area of two poleis or a stretch of water, because Greece has the sea winding through it everywhere.

比如,一座山脉,就能成为一种典型的城邦之间边界,由于希腊四处邻海,一段水域也可以成为边界

耶鲁公开课 - 古希腊历史简介课程节选

He noted that, this was only possible due to the earlier approval of planning regulations for the area within boundary of the Boulevard ring.

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Phase two would cover an area of over 16 sq m (40 sq km) along the eastern boundary of the phase one area.

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Instead of occurring at a plate boundary along an area called a subduction zone, where one tectonic plate is diving beneath another, this earthquake occurred in the middle of an oceanic plate, where the faults in the crust essentially moved from side to side instead of up and down.

MSN: Why this Indonesia quake didn't spark a monster tsunami