日期：
来源：雅诚德英语网
The canopy spectral reflectance were gradually getting larger in the visible region and smaller in the near infrared region as the growth stage went on.
冠层光谱反射率随发育期推移在可见光范围内逐渐增大，在近红外区域逐渐降低；
The canopy spectral reflectance were gradually getting larger in the visible region and smaller in the near infrared region as the growth stage went on.
冠层光谱反射率随发育期推移在可见光范围内逐渐增大，在近红外区域逐渐降低；