丹尼尔·拉德克利夫是将近100个已经捐赠现在为在线拍卖自署于纪念物发生为孩子的癌基础筹钱的名人之一。
Daniel Radcliffe is one of nearly 100 celebrities who have donated autographed memorabilia for an online auction taking place now to raise money for a children's cancer foundation.
防爆服的冷却层同样与自阿波罗任务后美国太空署宇航员在他们的宇航服内穿着的水冷服相似。
This layer is also similar to the water-cooled garments that NASA astronauts have worn inside their space suits since the Apollo missions.
自1980起，美国空气中铅平均浓度已下降了93%，主要缘于逐步停止在汽油中加入铅，环保署称。
National average concentrations of lead in the air have fallen 93% since 1980, largely because of the phaseout of lead in gasoline, the EPA says.
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