untraceable

H . G . Wells " invisible man " was invisible and untraceable.

威尔斯 的 “ 隐身人 ” 来无影去无踪,难以寻觅.

辞典例句

It would have phony license plates and the car itself would be untraceable.

车上的执照牌是假的,凭这辆车要追查车主人也是不可能的.

教父部分

He is calling on that line because he knows it's untraceable.

他打那个电话因为他知道无法被追踪.

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