Learner's definition of KEN
beyond someone's ken
: not within the range of what someone knows or understands在某人的知识范围之外 -
These changes occurred for reasons that are beyond my ken. [=reasons that I do not know or understand]我对这些变化的原因一无所知。
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miracles that are beyond human ken [=miracles that cannot be understood by human beings]让人类迷惑不解的奇迹