Congress had banned slavery in those places under the Missouri Compromise Act of Eighteen Twenty.

VOA: special.2009.05.21

But what I'm trying to get at is do you consider that you are under no obligation, since you haven't actually entered into any act of consent, but for prudential reasons, you do what you're supposed to do according to the law?

但我想知道的是，你认为自己,不负有任何义务，因为你并未真正作出任何形式的同意，只是出于谨慎考虑，你还是会依法缴税，是吗？

耶鲁公开课 - 公正课程节选

This method of drilling is not federally supervised under the Safe Drinking Water Act.

VOA: special.2009.10.23

The corals are now listed as threatened under America's Endangered Species Act.

VOA: special.2010.08.10

Under his theory, businesses act as structures for conflict resolution.

VOA: special.2009.10.16

"And today I return to Columbus to mark a milestone on the road to recovery: The 10,000th project launched under the Recovery Act.

VOA: standard.2010.06.18

"Earlier today,the president designated three Mexican organizations under the Foreign Narcotics Kingpin Designation Act.

VOA: standard.2009.04.15