In the United States the rules for charter schools differ from state to state.

VOA: special.2010.01.21

What are the qualities necessary for sound statesmanship? How does statecraft ? differ from other kinds of activities?

什么样的特质是正直政治家所应具备的风范,权术又如何,独善于其它类型的活动呢？

耶鲁公开课 - 政治哲学导论课程节选

It turns out that one of the places that's been very fruitful to look for proteins that differ between cell populations is on the surface of the cell.

而事实证明,寻找能鉴别细胞种类的,特定蛋白的最佳位置,是在富含蛋白的细胞膜上

耶鲁公开课 - 生物医学工程探索课程节选

But they differ on one major point. Most Americans now pay for health care through private insurance.

VOA: standard.2009.12.27