例句：

　　You should cut down on fats and carbohydrates.

　　你應(yīng)該減少攝入脂肪和碳水化合物。

　　Cut down your overall amount of physical activity

　　減少體力活動(dòng)的總量。

　　They ordered that for every tree cut down two more be planted.

　　他們要求每砍伐一棵樹(shù)就要補(bǔ)栽兩棵樹(shù)。

　　They ordered that for every tree cut down two more should be planted.

　　他們要求每砍伐一棵樹(shù)就要補(bǔ)栽兩棵樹(shù)。

　　We're trying to cut down on the amount of paperwork involved.

　　我們正在努力降低有關(guān)此事的文書(shū)工作量。