English method of timbering

例句：

1. 1. Timberis a renewable resource that can be harvested and replanted.
   木材是一种可再生资源，可以采伐后重新种植。
2. 2. The forestry department has been cuttingdown trees to make room for new buildings.
   林业部门一直在砍伐树木以腾出空间建造新建筑。
3. 3. Timber prices have been risingdue to increased demand and supplyconstraints.
   由于需求增加和供应约束，木材价格一直在上涨。