若改变原制冷设备使之与液化石油气相匹配，则以液化石油气为制冷剂时，制冷循环的性能要优于r22。

Change original refrigeration equipment make it with LPG phase match, while regarding LPG as the refrigerant, the performance of refrigeration circulation should be superior to R22.

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If the bonding energy is very strongly negative, thermal energy isn't great enough to disrupt those bonds and allow those bonds to be broken and then have fluidity.

如果键能非常强，热能并不足以,打破这些化学键,破坏这些化学键,并使它们液化。

麻省理工公开课 - 固态化学导论课程节选