Recognition of the harm asbestoscan do and the ban on its new uses did not take place until recently.

VOA: special.2009.11.17

I mean you have to ask yourself why did we ban thalidomide.

请回想一下,我们为什么要禁止使用沙利度胺。

普林斯顿公开课 - 人性课程节选

The question was this: did Congress have the power to control or even ban slavery in the new territories?

VOA: special.2009.03.05

Rachel Carson did not live to see how her book influenced the governments decision to ban DDT.

VOA: special.2010.03.14

The fishing ban announced Sunday did not affect state waters west of the Mississippi River.

VOA: special.2010.05.04

Mr.Ban dismissed the scandal, saying he did not think it would affect the negotiations in Copenhagen.

VOA: standard.2009.12.09

In its 1973 "Roe versus Wade" decision, the U.S.Supreme Court ruled that individual states may not ban abortion, but it did not end the political battle over the issue.

VOA: standard.2009.05.17

In the year 2000, the United States did ease the agricultural export ban to Cuba, but a later tightening of policy, to require advance cash payments, choked off Cuban purchases of US grain.

VOA: standard.2010.07.29