顶着亚利桑那亚州图森附近的酷热，博格斯一直监测着一块沙漠带，几代科学家进行了持续80年的测量、拍摄。

Out in the stark sun near Tucson, Arizona, he has been monitoring a desert plot that several generations of scientists have continuously measured and photographed for 80 years;

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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.

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鬣蜥科的其他分支包括斐济带纹鬣蜥、沙漠鬣蜥、加拉帕戈斯群岛海鬣蜥。

Other members of the iguana family include the Fiji Island banded iguana, the desert iguana, and the Galápagos Islands marine iguana.

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