It is generally accepted that the carbon isotopic composition of plant material is correlated with C3 and C4 pathways of carbon fixation in photosynthesis.
一般认为，任何植物体的碳同位素组成主要与光合作用的C3和C4两种碳固定途径有关。
The clay content and clay composition of the tested soils are the two important factors influencing their fixed ammonium content and maximum capacity of ammonium fixation.
土壤粘粒含量和粘土矿物组成是决定土壤固定态铵含量及最大固铵容量的两个主要因素。
A composition for an ink acceptable layer has excellent light resistance and discoloration resistance while maintaining improved ink fixation properties and glossiness.
用于油墨接受层的组合物，其具有优异耐光性和耐褪色性，同时保持改进的油墨固定特性和光泽度。
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