To get the cDNA clones which cover the whole genome of SARS-CoV PUMC 2 strain.
目的分段克隆SARS冠状病毒PUMC2株的全基因组cDNA。
The model introduced a geometrical similarity parameter,which describes the influences of plant crown shape on leaf/branch angle distribution frequencies,fraction of shadowed or illuminated canopy and background,canopy reflectance,and finally scene reflectance.
该模型引入一个几何相似性参数,用以描述植株冠层的几何形状对叶/枝角分布、阴影地面比例、冠层和地面各光学分量、冠层反射率和总反射率的影响。
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