同时，戒备森严的两国陆地边界附近没有紧张的迹象。

Meanwhile, there were no signs of tension along the heavily fortified land border separating the two Koreas.

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北方空军轰炸了南苏丹边界附近的反对派据点Kurmuk。

The northern air force has bombed the rebels’ stronghold at Kurmuk, nearer the border with South Sudan.

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三十年前，越南士兵在北部边界附近的谅山展开最后的激战以击退敌军。

Thirty years ago, Vietnamese soldiers waged a final, furious battle in the hills of Lang Son near the country's northern border to push back enemy troops.

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