...性因子对干旱生境的适应性比较 关键词：荒漠灌木；根系构型特征；叶性因子；干旱；适应性 [gap=12060]Keywords：desert shrubs；architecture characteristics of root systems；leaf traits；aridity；adaptability ..
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Where a little rain falls, grass and desert shrubs appear.
稍有降雨的地方，就有青草和灌木生长。
Southwestern u. s is desert and semidesert, sparely covered with giant cactus and low shrubs, hot in the day and cold at night.
美国的西南部是沙漠和半沙漠，零星散布着一些巨大的仙人掌属植物和低矮的灌木，白天很热，晚上很冷。
Where there used to be nothing but desert, he says, there is now not just grass but shrubs and acacia trees--and he has the photos from 30 years of extensive field study to prove it.
过去这里只有沙漠，他说，可现在这里不仅有草地，还有灌木和金合欢——他有大量30多年从事这方面研究的照片作证。“牧民们把骆驼带到他们以前从来没有见过的如此丰茂的草场上吃草。
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