South Korea warns any long-range launch by the North will be a violation of a U.N.resolution passed in 2006, when North Korea conducted long-range missile and nuclear weapons tests within months of each other.

VOA: standard.2009.03.12

We can think about the Lyman series, which is 1 where n equals 1. We know that that's going to be a higher energy difference, so that means that we're going to be in the UV range.

我们可以来看看Lyman系,也就是n等于,我们知道它的能量差更大,所以它在紫外光区内。

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North Korea announced Tuesday it is leaving the Chinese-sponsored six-party talks on its nuclear program and will restart its plutonium facility at Yongbyon in response to a U.N.Security Council statement condemning its April 5 launch of a long-range ballistic missile.

VOA: standard.2009.04.15