he adds,we must be vigilant. Khamenei also pointed an accusatory finger, once again,at the Western press, as he has done repeatedly in recent weeks, saying Western "enemies" of Iran are using "their media to instruct agitators who are provoking chaos, destruction and violence."

VOA: standard.2009.07.20

In other words, once you start thinking about the evanescence of dominance, you're also thinking about literary history.

也就是说，每一种文学支配地位的消失，形成了文学史。

耶鲁公开课 - 文学理论导论课程节选

Also, in a very different mood, the poem "For Once, Then, Something."

还有另一首完全不同的情绪的诗，“只一次，便成永远“

耶鲁公开课 - 现代诗歌课程节选