取代基的强度 substituent strength 基床强度控制条件 subgrade strength control condition 基床强度与变形 strength and deformation of rail subgrade .
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研究表明配位键的强度不仅受取代基R的影响，而且还与环结构的变化有关。
The strength of the dative bond deponds not only on the substituents R, but also on the skeletal structure of the parent ring.
配体的中心骨架、功能末端基、取代基的位置及抗衡阴离子等因素对配合物的荧光强度均有较大影响；
The luminescent properties of the complexes are influenced by the skeleton structure, terminal groups, the different position of the substituents of the ligands and the counter anions.
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