You see, the proposed shelter forests would be planted in place of grasslands.

你看，拟议中的防护林将取代草地。

(male professor) It is not a good idea to plant shelter forest in temperate zones.

（男教授） 在温带地区种植防护林并不是一个好主意。

Shelter forests are planted in order to create a large forest as quickly as possible.

种植防护林是为了尽快形成大片森林。

First, desertification is a serious threat to agriculture in some temperate areas but it is not clear that shelter forests would actually benefit local farmers.

首先，荒漠化对一些温带地区的农业构成严重威胁， 但目前尚不清楚防护林是否真的能让当地农民受益。

Logically, if there's not very much diversity in the types of trees in shelter forests, then such forests would only support a correspondingly small number of species or types of animals.

从逻辑上讲， 如果防护林中的树木类型没有太多多样性，那么这些森林只能支持相应少量的物种或动物类型。

Because shelter forests are intended to slow the spread of deserts, they are planted in areas with already limited water supplies and shelter forests have been found to use up significant amounts of groundwater in these areas.

由于防护林的目的是减缓沙漠的蔓延，因此它们被种植在供水已经有限的地区， 并且人们发现防护林消耗了这些地区大量的地下水。