Assistant Secretary Feltman told lawmakers Wednesday that while they might think they are hearing different messages now from the Obama administration regarding support for Iranian reformers, commitments remain the same as those President Obama expressed in the speech he delivered in Cairo last July, aimed at the Muslim world.

VOA: standard.2009.10.28

The notion of conservation is that there's ways to transform things such that some aspects of them change but others remain the same.

守恒是指物体某方面的特征,不会因为其他方面特征的改变,而有所改变

耶鲁公开课 - 心理学导论课程节选

Socrates seems to remain, even until the end, very much a kind of law unto himself while at the same time, again, providing Crito and others like him an example of rational and dignified obedience to the law.

苏格拉底一直到最后，似乎都保持着一种自我定义的法律,但同时，却也提供克里托及其它同类,一种理信,与庄严的服从法律范例。

耶鲁公开课 - 政治哲学导论课程节选