It is not fool proof but it is a method.

这不是傻瓜证明，但它是一个方法。

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But this approach certainly is not fool-proof and often leads to error.

但这种方法当然不可靠，常常会导致错误。

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But this approach certainly is not fool-proof and often leads to error.

但这种方法当然不可靠，常常会导致错误。

youdao