In cases where the explanation is unknown 中 in case 引导一个定语从句,where后的句子为定语从句the scientific point of view is that there is a reason if it can only be discovered中the scientific point of view 是主语,意为科学观点,that there is a reason if it can only be discovered中that引导了一个宾语从句,宾语从句中嵌套了一个条件状语从句,本句意思为在无法解释的情况下,科学的观点是它被发现是有原因的。
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