"This is one of the clearest calls repeatedly rendered to the government of Sri Lanka - that the U.N.be allowed to access the area so we can assess independently the situation of civilians,"

VOA: standard.2009.05.11

The other thing is that we can re-write our h c n in terms of bonds.

还有一件事是我们可以用键的形式来表示氰化氢。

麻省理工公开课 - 化学原理课程节选

We also know how to figure out the energy of this orbital, and we know how to figure out the energy using this formula here, which was the binding energy, -Rh which is negative r h, we can plug it in because n equals 1, so over 1 squared, and the actual energy is here.

我们知道如何算出,这个轨道的能级，而且我们知道如何,用这个公式,算出能量，也即是结合能，等于，我们把n等于1代进来，所以除以1的平方，这就是能量。

麻省理工公开课 - 化学原理课程节选

For the U.N.to keep urging that peace be created first before a U.N.peacekeeping force can be sent continues to deny the Somali people badly-needed international forces to assist in the stabilization of that country,".

VOA: standard.2009.06.26