不可 1.(不可以) cannot; should not; must not; not allowed; forbidden 不可一概而論 must not make sweeping generalizations; 不可剝奪的權利 an inalienable right; 不可抗拒的歷史潮流 an irresistible historical trend; 兩者不可偏廢。 neither can be neglected. 我們不可這樣匆促作出決定。 no (such) hasty decision should be made by us.2.(“非 ...不可”表示“一定”) must 這部電影太精彩了, 我非看不可。 the film is extremely good, i just cannot miss it. 這個會太重要了, 我非去不可。 the meeting is very important. i simply must go
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So , once again , there is a class of problem for which we conclusively believe that no solution or answer is possible 不可判定的。因此,又有一類問題我們認為是沒有可能的解決方案或答案的。
The reached conclusion shows that no matter how advanced the programming language is , if the real computer is based on the model of " turing machine " , the ability of the program will always be limited , i . e . there are many undecidable programs 由得出的結論可知:無論程序設計語言如何進步,只要最終的實際計算機是基于圖靈機模型,則程序的功能總具有局限性,即存在大量不可判定的程序。
Through such a study , it is also shown that when the time delay is long enough such that the stability switches of the equilibrium of system halt , the bifurcation branches originated from the critical time delays cannot be surely stable or unstable in the whole solution space , that is , their stability depends on cases . this phenomenon also implies that the stability of the periodic solutions on the bifurcation diagrams indicates only the stability on the local center manifo ld . some distinguished features of delay dyn 利用打靶法的數值結果說明了當系統(tǒng)平衡點不再發(fā)生穩(wěn)定性切換時,源自這些臨界時滯處的解支的穩(wěn)定性在整個解空間的穩(wěn)定性具有不可判定性,這也說明由多尺度法所得高階近似判定的解支的穩(wěn)定性事實上只表示解支在局部中心流形上的穩(wěn)定性,而非在整個解空間中的穩(wěn)定性。
The paper also analyzes " the undecidable propositions " in the conclusion of godel ' s incompleteness theorem , and finds that they are often mistakenly explained in three ways : propositions whose truth are undistinguishable ; propositions whose truth are uncertain ; and any other propositions than the self - reference and substitution propositions whose truth are unprovable 結論中的“不可判定”命題,現(xiàn)在有三種不同的錯誤解釋:是非不可分辨的命題(三值) 、是非可分辨但不確定的命題(二值) 、除自指代命題之外的是非都不可證的其他命題,它們都不是哥德爾的證法所支持的結論。