unperturbed [ʌnpə'tə:bd]

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附加级

a.undisturbed; calm

She seemed unperturbed by the news. 她听到这消息似乎并不惊慌。
We will call the system with Hamitonian ?0 the unperturbed system. 我们把具有哈密顿算符？0的体系叫做未微扰体系。