Because of the high demand for both aircraft production and for spruce to be used as a major material in manufacturing parts, forests of this popular wood were rapidly depleted.
由于飞机生产的高需求和云杉都被部分用作制造的主要材料，木材森林的这种流行正在迅速枯竭。
2
But once the capsules are depleted, the material can no longer mend itself.
荚囊一旦使用过了，材料就无法再一次进行修复。
3
The surface region was also depleted in CH, but the content of anhydrous material was little affected.