A recent progress report on HIV/AIDS says Botswana is one of the nine Southern African countries that continue to bear the global burden of HIV/AIDS, with each country having an adult prevalence of more than 10 percent. The government's national AIDS control program has boosted testing,prevention and treatment efforts.
VOA: standard.2010.05.10
Clearly, we put 2 for each bond, and now we end up having 2 remaining bonding electrons left.
显然,我们在每个键处放上两个电子,那么最后我们还剩下两个成键电子。
So in oxygen again, this is just showing the valence electrons, so we end up having six valence electrons from each oxygen atom.
所以在氧里面,这里只展示价电子,我们最后每个氧得到6个价电子。
A further theme in Deuteronomy is the fact that the covenant concept entails the idea that each generation of Israelites understand itself as having been bound with God in the original covenant.
申命记一个更深的主题是事实上契约,传承了一种理念,即每一代以色列人都认为他们,通过最初的契约与上帝紧密相连。
And so, maybe it's just a matter of each person having his or her own principles and there's nothing more to be said about it, no way of reasoning.
也许这本就是智者见智,仁者见仁的问题,多说无益,也无从论证。
The way that they communicate with each other is by physically touching each other, and the way that they connect across distances is by having these process that extend from one place to another.
它们通过物理接触,来交换信息,神经之所以能跨距离传递信息,就是靠细胞间互相延伸的突起
And then we end up having 6 shared electrons, 2 from each of the bonds, so we end up with a formal charge on sulfur of plus 1.
然后我们有六个共用电子,每个键两个,因此最终硫的形式电荷量为正一。
now we're not just talking about 1 photon, 1/2 let's say we shoot them all at the same time at our metal, each of them having some energy that's let's say 1/2 the work function. So, just to take a little bit of an informal survey, who thinks here that we will have an electron that is ejected in this case?
我们现在不仅仅讨论一个光子,它们所具有的能量是功函数的,我们在同一时刻把它们打到金属上,我们做一个不太正式的调查,谁认为这种情况下,一个电子会被打出?
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