Individual Web addresses would then follow. U.N.Under Secretary General for Economic and Social Affairs Sha Zukang highlighted the reason for this year's conference, "Creating Opportunities for All,"

VOA: standard.2009.11.16

So, in terms of finishing our Lewis structure, we're actually not done yet here, even though we have full octets, and we've used up all of our valence electrons, and the reason is because it's c n minus, so we need to make sure that that's reflected in our Lewis structure, so let's put it in brackets here, and put a minus 1.

那么，根据我们的路易斯结构的完成情况，我们实际上还没有全部完成，尽管我们有了填满的“八隅体“,而且用完了所有的价电子，原因就是因为这是一个负离子，我们需要确保我们的路易斯结构能反映出这一点，所以让我们给它加个括号，再加个负一。

麻省理工公开课 - 化学原理课程节选

Again, the reason for that is because the energy only depends on the n value here, it doesn't depend on l or on m.

因为，能量,只和n的值有关，与l和m的值无关。

麻省理工公开课 - 化学原理课程节选

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