Because we have paired set in a 2 s orbital, so all we're left essentially is two electrons that are available for bonding.

因为我们有一对，在2s轨道里已经配对了,所以只剩下两个电子可以用来成键。

麻省理工公开课 - 化学原理课程节选

You also know that there's some vaccines that are not yet available, for diseases that we would very much like to prevent.

你们知道现在还有一些疫苗,仍没有研制出来,都是针对那些亟需预防的疾病的

耶鲁公开课 - 生物医学工程探索课程节选

for medical services or doctors are available because of 24 hours change.

因为24小时的值班制,人们可以随时接到代诊服务。

普林斯顿公开课 - 国际座谈会课程节选

Right now what you want to make sure is that there is a time that's available... right now all the times are available... but that there is a time that works for you.

现在你需要确定的,是你有现成的时间。,目前所有的时间都是现成的。,而且要有你可以使用的时间。

耶鲁公开课 - 死亡课程节选

That will lead us into a discussion of sort of modern methods and sort of the spectrum of methods that are available now for vaccine development.

而这使得我们有必要对于,在现代疫苗的发展中,可供使用的方式方法进行讨论

耶鲁公开课 - 生物医学工程探索课程节选

And that will bring us to a general discussion of sort of the tools that are available now for vaccine development, which we'll talk about on Thursday.

并且进一步探讨,现阶段推动疫苗发展的方法,我们会在星期四讨论这些

耶鲁公开课 - 生物医学工程探索课程节选