例文
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- The model uses the harmonic approximation to model interactions.
- Below are a few which cannot be determined through the harmonic approximation alone.
- The Hamiltonian of phonon system with the harmonic approximation is
- The two contributions are the same ( in the harmonic approximation ) assuming validity of classical mechanics.
- For very symmetric molecules, certain vibrations may be both infrared and Raman inactive ( within the harmonic approximation ).