Experts say the ability to take up lead is reduced when the pH level is above six and a half.

VOA: special.2009.06.09

So, I went to the library and I looked up Advances in Molten Salt Chemistry volume six because there's an article in there about the chemistry and electrochemistry of magnesium production.

所以我去了趟图书馆，查阅了,第六版的《高级熔融态盐化学》,因为那里面有一篇关于生产镁的,化学和电化学的文章。

麻省理工公开课 - 固态化学导论课程节选

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。

麻省理工公开课 - 化学原理课程节选

It stood four to six meters tall, was about twelve meters long, and weighed up to seven tons.

VOA: special.2009.09.01

Whatever happens to me, when it's spread out over six billion plus people, it ends up divided by six billion and it becomes unobservable.

发生在我身上的事，分散到六十多亿人口上，被六十亿除,就变得难以察觉。

耶鲁公开课 - 金融市场课程节选

The "six" in the expression comes from the six feet that make up a fathom which is a little less than two meters.

VOA: special.2009.05.24

And the company grew 80%per year for the first eight years compounded, and 60 % per year for the six years after that, which adds up to tens of billions real quick, as you know.

公司保持百分之八十的年增长,持续了八年，这之后的六年，每年增长百分之六十，正如你们所知，在很短的,一段时间内赚了数百亿。

斯坦福公开课 - 戴尔CEO-Michael.Dell谈创业和发展课程节选

Ash up to three hundred meters thick covered more than six hundred square kilometers around the volcano.

VOA: special.2010.07.05

But let us still remember these six or seven factors, or whatever I had up there, and remember what these two places had in common.

但我们要记得之前提到的六条,还是七条,还是别的什么影响因素,我忘记了,记得这相同的两点

耶鲁公开课 - 欧洲文明课程节选

The "six" in the expression comes from the six feet that make up a fathom -- which is a little less than two meters.

VOA: special.2011.03.06

So, initially they came up with four lines and then eventually five and even six, and then they went back to five by the fifteenth century.

那么,他们最初提出的是四条线,但是最终却是五条线,甚至六条线,然后在十五世纪又回到了五条线

耶鲁公开课 - 聆听音乐课程节选

In one study,infected mothers began to take three anti-H.I.V.drugs while breastfeeding for up to six months.

VOA: special.2009.07.29

I served as Master of Silliman College for six years and during that time I would get up at 5 or 5:30 in the morning and start working.

我在西利曼学院当了六年院长,那时我会在早上五点或五点半起床,并开始工作

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

They were designed to fly at speeds up to six thousand four hundred kilometers an hour.

VOA: special.2010.07.07

But days three and six each have an extra element, And the fact that the first elements here pair up nicely with each other suggests that the extra element on day three and the extra element on day six might also be paired in some important way.

但是第三天和第六天都有一个附加的因素，首要的因素就是这些事物都完美地匹配,这表明，第三天的附加因素,也应该与第六天的附加因素在重要的方面相匹配。

耶鲁公开课 - 旧约导论课程节选

"Rhonda Smith of Tennessee described how in two thousand six her Toyota-made Lexus sped up for a time to one hundred sixty kilometers an hour.

VOA: special.2010.02.26

So, we end up with a total of six electrons that are possible that have that 2 p orbital value.

所以我们最后,总共得到了6个电子,在所有可能的“2p“轨道值中。

麻省理工公开课 - 化学原理课程节选

The actions were conditions for additional government aid of up to six billion dollars.

VOA: special.2009.05.01

Benzene is a ring that's made up of six carbon atoms and six hydrogen atoms.

苯环是一个由六个碳原子,和六个氢原子组成的环。

麻省理工公开课 - 化学原理课程节选

So America's space agency,NASA, said there was no reason to send up Gemini Six.

VOA: special.2009.07.01

Bob mentioned in his introduction that I showed up at Yale in 1985, after having spent six years on Wall Street, and I was totally unencumbered by any portfolio management experience.

鲍勃在介绍中提到,我1985年刚来耶鲁时,已经在华尔街待了六年,完全没有任何,投资组合管理的经验

耶鲁公开课 - 金融市场课程节选

Some of the mummies had signs of atherosclerosis in the inner walls of up to six arteries, the passages that lead blood away from the heart.

VOA: special.2009.12.15

The United States government has created possible flags that have up to fifty-six stars.

VOA: special.2010.04.02

He was born in Boston,Massachusetts in eighteen thirty-six and grew up in Cambridge.

VOA: special.2010.07.25

In fact,a hippo can stay under water for up to six minutes.

VOA: special.2009.08.19

Before then,the same trip might have taken up to six months.

VOA: special.2009.02.21

The Supreme Court took up the case in December, eighteen fifty-six.

VOA: special.2009.05.14

thirty-six feet per second up. Very smooth, very quiet ride."

VOA: special.2009.07.15

People stand and look up at the six men.

VOA: special.2010.05.31

"If children were exclusively breastfed for six months, continued to breastfeed up to two years, with appropriate additional food from six months onwards, we could save 1.5 million children under five years of age out the 8.8 million that we estimate to die currently every year."

VOA: special.2010.08.04