So, bonding orbitals are down here.

所以成键轨道在下面。

youdao

Reading aloud to them just before bedtime is a great idea, because it quiets them down after a day of activity, it gives you quality bonding time together, and it gets them into the habit of reading.

睡前朗读一本书很不错，因为这会让他们在一天的活动后安静下来。

youdao

This is also to avoid the mother/calf bonding. Mother cows have been known to break down the stall in an attempt to find their offspring.

哪怕是在号称“人性化”的乳制品厂也是一样，把奶牛屠宰，带走小牛犊都是为了维持利润，同时也是防止母奶牛对小牛犊产生母爱，以免再发生母奶牛为了寻找小牛犊而冲破牛栏的情况。

youdao

So since we have two lone pairs, we're going to be pushing down even further on the bonding electrons, so we're going to smoosh those bonds even closer together.

因为我们有了两个孤对，我们会把成键电子,更加向下压，所以我们把这些键更加紧得推到一起。

麻省理工公开课 - 化学原理课程节选

So what we see is on ammonia here, 107 we know that it's less than a 109 . 5, it's actually 107, so it's less than a 109 . 5, because of that lone pair pushing down in the bonding electrons.

我们看到在氨分子里，我们知道它比１０９．５要小，它是，所以比109。5要小，因为孤对会把成键电子向下推。

麻省理工公开课 - 化学原理课程节选

That is what gets crunched down to covalent bonding.

这就要归结与共价键。

麻省理工公开课 - 固态化学导论课程节选