例句與造句

1. R _ p = k _ p [ M ] [ P \ centerdot ] where k _ p is the homogeneous propagation rate constant for polymerization within the particles and [ M ] is the equilibrium monomer concentration within a particle . [ P \ centerdot ] represents the concentration of the polymerizing radical in the reaction.
2. It's difficult to find propagation rate constant in a sentence. 用propagation rate constant造句挺難的