"This is unchartered territory," says Dr Marasco.

“这是一个未知领域，”Marasco博士说。

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Indeed, we are moving through unchartered territory and we need new ways of understanding the shifting dynamics of the international landscape and our own bilateral relationship.

确实，我们正在走前人没有走过的路，我们需要用新的方式来理解国际环境的变化因素和我们本身的双边关系。

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The legislation was "unchartered territory", she said, predicting that the introduction of elected peers would transfer power from MPs to the Lords.

BBC: Ministers abandon planned timetable for Lords reform

Unfortunately, the CDC itself was in unchartered territory at the time.

CNN: An anthrax survivor looks back

His eyes narrowed, sensing he was walking into unchartered territory.

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