被试实验中的表现在观看树木、田地、小山后能够很快得到恢复，而观看街道、工业区、甚至几何图形都不能达到这样的效果。
People's performance was soon restored by picture of trees, fields and hills, but not by streets, industrial units or even complex geometric patterns.
但是，该实验同样表明，从植物或树木中收集能源也是有可能实现的。
But the experiment also suggests it may be possible to harvest energy from plants and trees.
有些国家的研究人员正在开展一项农林相结合的实验——在一排排特殊的树木间种植庄稼。
In some countries, researchers are now experimenting with agro-forestry-the planting of crops between rows of special trees.
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