The result showed that the light distribution in the canopy were obviously affected by the leaf area index (LAI), the structure of canopy, solar radiation and its apparentmovement, etc.
结果表明:梨树叶幕光能分布状况直接受叶面积系数、树冠结构、太阳位置及光强的影响。
3
From knowing the diameter of the Earth's orbit and the apparent angular movement of the star, we can calculate the distance to it.