"Every time Americans debate the problem of states' rights, the relationship of federal power to state power -- which we are indeed having a roiling debate again -- and every time we debate not only race relations, but the very idea of what it means to be an American, multi-racial,greatly diverse society, we are debating the direct legacies of the Civil War."

VOA: special.2011.04.09

That is the power of having a rationalized system of units. That is the good news.

这就是拥有合理单位的好处,这可是个好消息。

麻省理工公开课 - 固态化学导论课程节选

having more capital, standing for a set of values is a key part of our power.

拥有更多资产，坚持价值观,是力量的关键。

普林斯顿公开课 - 国际座谈会课程节选

"If we had a clean energy economy powered by wind and solar and tidal power we probably would not be here having this discussion today."

VOA: standard.2010.07.31

The Hanwoo species is recognized as having great physical power and stamina."

VOA: standard.2010.03.22