例句：
You should cut down on fats and carbohydrates.
你应该减少摄入脂肪和碳水化合物。
Cut down your overall amount of physical activity
减少体力活动的'总量。
They ordered that for every tree cut down two more be planted.
他们要求每砍伐一棵树就要补栽两棵树。
They ordered that for every tree cut down two more should be planted.
他们要求每砍伐一棵树就要补栽两棵树。
We're trying to cut down on the amount of paperwork involved.
我们正在努力降低有关此事的文书工作量。