The State Department said Monday the administration still has a hand extended to Iran despite the chilly reaction by Iran's supreme leader to Mr.Obama's videotaped holiday greeting to Iran late last week, in which he said the United States seeks honest engagement with Iran's Islamic government based on mutual respect.

VOA: standard.2009.03.23

That is to say I can now reroute that sodium plus chlorine reaction and go a different way, but I still end up with the same change in energy.

也就是说，我可以重新定义一种,钠与氯的反应途径,从另一种途径来实现反应，但是能量的变化过程相同。

麻省理工公开课 - 固态化学导论课程节选