When america was attacked in september 2001 , nato formally invoked article 5 for the first time .
当美国在2001年9月遭遇攻击的时候，北约首次正式援引第五款。
However , aristotle thought the concept of purpose could be invoked to explain the behaviour of everything in the universe .
但是，亚里斯多德思想中的目的概念会被援引来解释宇宙中的一切行为。
The intervention in libya was invoked as an act of moral , not just strategic , leadership .
介入利比亚是行使道义上，而不仅仅是战略上的领导权。
But the terms became binding for all holders of greek bonds issued under greek law after the government invoked clauses that had been retroactively added to the terms of the contracts .
