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I sent my Soul through the Invisible, Some letter of that After-life to spell: And by and by my Soul return'd to me, And answer'd "I Myself am Heav'n and Hell."
要理解一个人,你必须先理解他们的沉默。
判断两个λ表达式是否等价的问题是无法解决的。
Coal enterprises must actively adapt to energy structure adjustments and accelerate transformation and upgrading.