广播电视英语短句 第 335 课：有机盖土-5

Leaf mulch can also be used in flower beds. 树叶盖土也能作花床。

Mulching is one of the best things people can do for their gardens. 土壤覆盖是人们可以为自己花园作的最好事情之一。

It helps keep the soil from getting dry, so it reduces the need for watering. 它保持土壤不会变干，从而也减少了对水的需求量。

It also limits temperature changes in the soil. 它还限制土壤的温度变化。

Mulch forms a barrier between the soil and the air. 盖土形成土壤与空气之间的屏障。