The first order non-simple harmonic coefficient enhances modulus.
第一非简谐系数的存在使弹性模量增大。
It is also found that the elastic modulus only relates to the first anharmonic coefficient, but has no relation to the simple harmonic coefficient and the second anharmonic coefficient.
弹性模量只与第一非简谐系数有关，而与简谐系数和第二非简谐系数无关。
It is also found that the elastic modulus only relates to the first anharmonic coefficient, but has no relation to the simple harmonic coefficient and the second anharmonic coefficient.
弹性模量只与第一非简谐系数有关，而与简谐系数和第二非简谐系数无关。
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