Spokesman Ken Haldin says a combination of testing by BP, the Environmental Protection Agency and landfill operators, including Waste Management, should ensure that debris from the oil cleanup can safely be added to household waste in these facilities.

VOA: standard.2010.08.05

So,as the vaccine was passed from arm to arm, it became less potent, and the length of protection that it would give you varied.

所以当疫苗从一个人传给另一个人之后,它的防治效力会减弱,它带给人的免疫期限也会改变

耶鲁公开课 - 生物医学工程探索课程节选

He'd gone to Kentucky and drunk lots of Bourbon once, he carried an umbrella, that sort of middle class symbol of protection, and he is chased from the throne in 1848.

他去过肯塔基州,嗜好波旁威士忌,他有一顶保护伞,即他是中产阶级的象征,他在1848年被王室追捕

耶鲁公开课 - 1871年后的法国课程节选