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27Â¥: Originally posted by hwceng0816 at 2012-05-02 18:47:50:
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fzx2008: ½ð±Ò+2, ר¼Ò¿¼ºË, ллָ½Ì 2012-05-01 22:04:36
where h is Planck¡¯s constant, k is Boltzmann¡¯s constant, NA is Avogadro¡¯s number, ¦Ñ is the density, M is the molecular weight and n is the number of atoms in the molecule.

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