日常固体中的声子的行为要复杂得多。
Phonon behaviour in a solid under everyday conditions is much more complex.
同时，我想为我任性的行为对你说声对不起。
Meanwhile, I would like to say sorry to you for my self-willed behavior.
猫有时温柔可爱，但也有时会喵喵叫，发出嘶嘶声并且行为恶劣。
Cats can be cuddly and sweet, but they can also meow, hiss and behave badly.
猫有时温柔可爱，但也有时会喵喵叫，发出嘶嘶声并且行为恶劣。
Cats can be cuddly and sweet, but they can also meow, hiss and behave badly.
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