Land that is not previously developed and landscapes altered by current or historical clearing or filling, agricultural or forestry use, or preserved natural area use are considered undeveloped land.

先前未开发的土地，以及被当前或历史上的清理或填埋、农业或林业用途改变的景观，或者保留的天然区域均被视为未开发的土地。

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Plumes of smoke from the blasts shrouded the area as the injured were laid out on a nearby square of undeveloped land.

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