• U.N.International Strategy for Disaster Reduction Deputy Director Helena Molin-Valdes told VOA health facilities need to be at the center of disaster relief.

    VOA: standard.2009.10.14

  • We didn't just need that n, not just the principle quantum number that we needed to discuss the energy, but we also need to talk about l and m, as we did in our clicker question up here.

    我们不仅需要n,不仅要这个可以,决定能量的主量子数,还需要m和l,就像我们做这道题这样。

    麻省理工公开课 - 化学原理课程节选

  • 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

  • He said the U.N.'s own security will need to be increased during this transition period, which will require adequate funding from member states.

    VOA: standard.2010.08.04

  • It's going to weigh too much, we don't need to look at it. But it'll still be order 2 to the n.

    我们没必要去看它,但是它还是要遵循2到n的顺序。

    麻省理工公开课 - 计算机科学及编程导论课程节选

  • So, we need to find another scheme, and that solution was provided for us by G. N. Lewis.

    所以我们需要寻找另一个理论来解释,而G。N。Lewis已经提供了答案。

    麻省理工公开课 - 固态化学导论课程节选

  • So this is not even thinking about the other electron shielding, just if we think of the fact, all we need to think about is that the effect of going to a further away n n as we go down the table.

    到现在我们甚至还没有考虑,其它电子的屏蔽效果,即使我们要考虑这个因素,我们需要考虑也就是,沿着周期表的某一列往下走,距离会逐渐变远,将起最重要的作用,actually,dominates,这一结果所产生的影响。

    麻省理工公开课 - 化学原理课程节选

  • I've got to test to see if I'm in the base case, and if I'm not, then I need to move a tower of size n minus 1, I need to move a tower of size 1, and I need to move a second-sorry about that a second tower of size n minus 1.

    首先我看看我是不是在最基本的情况,如果不是的话,我得先做一个N-1个,圆盘的移动,移动一个圆盘,然后再做一次N-1个圆盘的移动。

    麻省理工公开课 - 计算机科学及编程导论课程节选

  • Once I have it sorted I can search it in log n time, but that's still isn't as good as just doing n. And this led to this idea of amortization, which is I need to not only factor in the cost, but how am I going to use it?

    一旦对其完成排序,就可以在log,n的时间内对其完成搜索,但是这样做仍然不如n的复杂度,这样做引出了耗时分摊的想法,这时不仅需要考虑耗时的因素?

    麻省理工公开课 - 计算机科学及编程导论课程节选

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