... 三角测量法 triangulation (surveying) 森林测量 forest measurement 摄影测量 photogrammetry ...
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其中的一个障碍是除非丈量每一英亩的土地，一直以来缺乏缺乏可靠的测量方式确定不同的森林到底能够存储多少的碳。
One obstacle has been the lack of a reliable way of measuring how much carbon is stored in different forests without inspecting every acre from the ground.
一种新的测量森林中碳含量的方法可能有助于它们免于砍伐。
A new way of measuring the carbon in forests may help keep them from being cut down.
比如，生物学高级班的学生，需要长途跋涉到纽约州奥兰吉郡的黑岩森林去测量雪的厚度，经常出入自然历史博物馆。
Advanced biology students, for example, trekked tothe Black Rock Forest, in Orange County, N.Y., to measure snow depth, andfrequented the Museum of Natural History.
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