The leaders of ExxonMobil,Shell, ConocoPhillips and Chevron, as well as BP America, testified before a House of Representatives committee Tuesday.
VOA: standard.2010.06.15
And he gave a very good analogy in saying, "It was almost as incredible as if you'd fired a 15 inch shell at a piece of tissue paper, and it came back and hit you."
他还打过一个很好的比方:,“这就像是,你用个15英寸果壳,打到面巾纸上被弹回来打到你,一样不可思议,“
Think of it as that egg shell part.
我们可以。
"The Gulf of Mexico response plans for ExxonMobil,Chevron, Conoco Phillips and Shell are virtually identical to BP's, and just as deficient."
VOA: standard.2010.06.15
r And what that is the probability of finding an electron in some shell where we define the thickness as d r, some distance, r, from the nucleus.
在某个位置为,厚度为dr的壳层内,找到原子,的概率,我们来考虑下我们这里所说的。
a perfectly spherical shell dr at some distance, thickness, d r, dr we talk about it as 4 pi r squared d r, so we just multiply that by the probability density.
在某个地方的完美球型壳层,厚度,我们把它叫做4πr平方,我们仅仅是把它,乘以概率密度。
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