However, because of difficulties in measuring lightattenuation in canopy gap and complex structure of forest canopies.
但是、由于林隙结构极为复杂，难以精确地测量林隙上方和周围树冠空隙的透光情况。
3
This paper describes the principle, method and apparatus for measurement of technical lightattenuation length of plastic scintillators. The factors that influences this parameter are discussed.