报告称，在过去的八年里，新发艾滋病病毒感染数已下降了17%。

It says new HIV infections have been reduced by 17% over the past eight years.

youdao

Breguet已经收到了八位数的报价，但仍拒绝出售。

Breguet has received offers in the eight digit range, but still refuse to sell.

youdao

这一指数显示，挪威仍排首位，但美国整体降至第八。

Our index still has Norway as number one but America drops to eighth.

youdao

So, if you look at all of these, we have full octets for all of them, and if we count up all of the valence electrons, it's going to be equal to our number 26 here.

那么，如果大家看看所有的这些，它们的“八隅体“都填满了，而如果我们来数一数价电子的总个数，它应该就等于我们这里的二十六。

麻省理工公开课 - 化学原理课程节选

And also I wanted to mention in terms of checking your Lewis structures, regardless of what they are, you should always go back and I had 10, and then count 2, 4, 6, 8, 10, because you always need to make sure you have the same number of valence electrons that you calculated in your actual structure.

我还想提一点关于检查,你的路易斯结构的建议，不管它们是什么，你总是应该回去检查一下,我有十个，然后数一数，二，四，六，八，十个，因为你总是需要确保实际价电子的数量,与你在结构中算出的数量相等。

麻省理工公开课 - 化学原理课程节选