叶绿素虽然已经进化得极为精巧，能捕捉阳光中的能量，但有时也会应接不暇，特别是在干旱、低温或缺乏营养的情况下。

Chlorophyll, although exquisitely evolved to capture the energy of sunlight, can sometimes be overwhelmed by it, especially in situations of drought, low temperatures, or nutrient deficiency.

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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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由于严峻的干旱导致的马拉·奎利河水中含氧量缺乏导致了河中数以千计的鱼死亡。

Plummeting water oxygen levels due to a severe drought have led to thousands of fish dying along the Manaquiri River.

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