在许多半干旱的地区中,同样存在树带界限的下限区域;在这片区域之内,由于缺乏水分,森林下沿区域的植被通常会逐渐变成干草原或沙漠。
In many semiarid areas there is also a lower timberline where the forest passes into steppe or desert at its lower edge, usually because of a lack of moisture.
再以长城沿线为界,南部为森林草原区,北部为干草原、沙化草原区。
Another line is nearly in Great Wall zone, where the south is forest grass zone, the north is dry and desert prairie.
再以长城沿线为界,南部为森林草原区,北部为干草原、沙化草原区。
Another line is nearly in Great Wall zone, where the south is forest grass zone, the north is dry and desert prairie.
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