THESE DANGEROUS YEARS 小霸王从军
For years researchers have attempted to show that television is dangerous to children.
多年来,研究人员一直试图证明电视对儿童的危害。
Much of this remains dangerous for thousands of years, and a proportion of it can be used to produce weapons-grade plutonium.
废弃物的放射性危险会延续数千年,而且部分还可以用来生产武器级放射性元素钚。
Cesium-137, with a half-life of 30 years, is another dangerous substance emitted in a full-scale nuclear meltdown.
核反应堆完全熔解后,会释放出另一种危险物质铯- 137。铯- 137的半衰期为30年。
About one hundred fifty years ago, a magazine described this same area as very dangerous.
VOA: special.2009.07.20
I think that many years ago, in the early 90s or 80s, or the 70s even, it was a very dangerous city.
我想很多年以前的八九十年代或者甚至七十年代,它是一个非常危险的城市。
It is just an extension and an outgrowth of a very dangerous trend that we have seen in our country over the last few years."
VOA: standard.2010.04.28
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