The researchers figured out water stress with a computer model that calculated how much water trees were getting in comparison with how much they needed.
2
在其他方面，灌溉、雨水控制、能量模型和树木带来的利益都有具体指标。
Specific metrics exist for irrigation, stormwater control, energy modeling, and benefits produced by trees, among others.
3
这个模型使用与树木布局模型一样、数量相同的PV(光伏)太阳能电池，因此有同样的输出峰值。
It had the same type and number of PV solar panels as the tree design, and the same peak voltage.
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