Why is the inside of everything so mysterious?

谜语题目：Why is the inside of everything so mysterious?（为什么说凡事内部都神秘莫测？）
 
 
谜语解析：ecause you can never make them out.　因为你永远也不能弄懂它们。make them out有两层意思：①把它们变到外面来；②弄懂它们，看清它们  mysterious adj.难理解的，神秘的
 
 
谜语答案：ecause you can never make them out.　因为你永远也不能弄懂它们。

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