Now the last thing is that because the neutron has no net charge, we can change neutron number.

现在，最后一件事是,因为中子没有净电子，我们可以改变中子数。

麻省理工公开课 - 固态化学导论课程节选

Of course, if we saw no shielding at all what we would end up with 3 is a z effective of 3.

当然如果我们说没有任何屏蔽,我们最后得到的,有效电荷量是。

麻省理工公开课 - 化学原理课程节选

And that way we won't have to worry about running out of time at the end.

这样我们没有必要担心,在最后超时了。

麻省理工公开课 - 固态化学导论课程节选

And finally, there's a new situation and no model of how to behave.

最后，如果这个实验没做过,我们就没有行为模式可以借鉴。

耶鲁公开课 - 心理学导论课程节选