Construction and maintenance of two wood debris dams across the outlet stream of Spring Pond.
近来，你在春池的河流出口处建造和维护了木堆水坝，这是违规的。
The maintenance and restoration process of existing aircraft required a large supply of wood.
这个过程对现有飞机维修和恢复需要大量的木材供应。
The maintenance and restoration process of existing aircraft required a large supply of wood.
这个过程对现有飞机维修和恢复需要大量的木材供应。
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