You can see that there is no value in studying inner shell electrons to ask questions about bonding.

你应该了解考虑成键时,去考虑内层电子,是毫无意义的。

麻省理工公开课 - 固态化学导论课程节选

This is physical attraction with close bonding but no commitment, Romeo and Juliet when they first met.

爱慕对方身体,关系亲密，但没有承诺，就像罗密欧遇到了朱丽叶。

耶鲁公开课 - 心理学导论课程节选

There's no one person owning them, so they both have two electrons here that are bonding.

这里没有人欠对方，因此它们都有两个成键的电子。

麻省理工公开课 - 化学原理课程节选

The native structure is this double stranded structure here and if I heat it up slightly and I add some base, so under slightly basic conditions, these molecules will fall apart because you've created conditions where the hydrogen bonding is no longer favorable so they peel apart.

原始结构,在这里就是指DNA双链,如果我稍微加热,并且加入一些碱,在弱碱性的条件下,这些配对碱基会分开,这是因为在一定条件下,碱基对之间的氢键,不再稳定并且会断裂分开

耶鲁公开课 - 生物医学工程探索课程节选

And obviously, no bond is the weakest of all is not bonding.

显然，没成键是最弱的。

麻省理工公开课 - 化学原理课程节选

The reason that it's sigma is if you look at the bonding axis here, is that there is no nodal plane along the bonding axis.

它是sigma键的原因是,因为如果你看键轴，上面是没有节面的。

麻省理工公开课 - 化学原理课程节选