He can take another step in that direction Saturday when the Jamaican four-by-100 relay team is expected to give Bolt a chance for his sixth straight gold.

VOA: standard.2009.08.21

And step four is going to have us figure out how many bonding electrons we have, so we have 16 minus 10, is going to be 6 bonding electrons.

而第四步需要判断,我们有多少个成键电子，那么我们有十六减十，也就是六个成键电子。

麻省理工公开课 - 化学原理课程节选

Then we're going to have another isothermal step, a compression to some point four.

然后有另外一个绝热过程，绝热压缩到4点。

麻省理工公开课 - 热力学与动力学课程节选

And the last example that we're going to talk about is thionyl chloride, so it's s o c l 2. This is another good step forward, because now we actually have four different atoms in our molecule.

我们要讨论的最后一个例子,是氯化亚砜，就是硫，氧，氯，二，这又是一个进步，因为我们的分子中现在有四个不同的原子了。

麻省理工公开课 - 化学原理课程节选

Step three to four isothermal compression, w2 delta u is going to be q2 plus w2.

第三步，到四点的等温压缩，Δu等于q2加。

麻省理工公开课 - 热力学与动力学课程节选