lumber tropical fresh water load line

例句：

1. 1. The lumber companyis cutting down trees for the new building.
   这家木材公司正在砍伐树木为新建筑提供材料。
2. 2. He was a lumberjack in his youth.
   他年轻时是一名伐木工。
3. 3. Timber is a renewable resourcethat can be used to build houses andfurniture.
   木材是一种可再生资源，可以用来建造房屋和家具。