"I'm a better singer experimenting with feel and taking my vocals up a notch,"

VOA: standard.2009.12.23

For the sulfur, we start off with 6 valence electrons, minus 4 lone pair electrons, minus 2, taking in account our bonding electrons, so we end up with a formal charge of 0.

对于硫，我们从六个价电子开始，减去四个孤对电子，再减去二，算上我们的成键电子，因此最终我们有零个形式电荷。

麻省理工公开课 - 化学原理课程节选

Eager as I had once been to go into politics, as I look at these things and saw everything taking any course at all with no direction or management, I ended up feeling dizzy.

我当初涉入政治的热切，对比于我所见的这些事,及所有的事,都毫无方向及管理可言，我最后是被搞胡涂了。

耶鲁公开课 - 政治哲学导论课程节选

When we talk about anti-bonding, 1sb essentially we're taking 1 s a and now we're subtracting 1 s b, sigma1s and what we end up with again is sigma 1 s, and the important thing to remember is to write this star here.

当我们讨论反键时，本质上我们是用1sa减去，最后我们得到，记住这里有个星。

麻省理工公开课 - 化学原理课程节选