英语语法分析

There should be at least two lines in each windbreak .

在每个防风林中应该至少有两条防线。

And they a windbreak, reducing heating costs in winter.

冬天，树木还可以起到防风林的作用，减少加热系统的花费。

And they act a windbreak, reducing heating costs in the winter.

冬天还可以作为防风林减少取暖的耗费。