他把煤块塞进钟形装置的中心，并全部放在表壳上，然后紧紧地裹成一个茧状。

He tucked the coal into the center of the clockwork, and placed it all on the skin, and wrapped it up and tight it into a cocoon shape.

youdao

必须把农业部门放在发展的中心，才能在2015年把极度贫困和饥饿人口减少一半。

The agriculture sector must be placed at the center of development to cut in half extreme poverty and hunger by 2015.

youdao

在某些人看来，确立文学经典的过程，在某种程度上是某些学者把自己的工作放在中心位置，而把别人的工作放在次要地位的一种尝试。

The process of establishing a literary canon is seen by some as, in part, an attempt by certain scholars to make their own labors central and to relegate the work of others to marginal status.

youdao

I don't even care if you try to put it at the heart of the nucleus.

我甚至不介意,如果你试着把它放在原子的中心。

麻省理工公开课 - 固态化学导论课程节选

Often a good thing to start with is to put the lowest ionization energy atom in the middle, and if you don't have charge separation then go with that structure, but if you do find you have a lot of separation, such as the case in negative 2, positive 2, and minus 1, then you want to say wait a second, this is really bad in terms of formal charge, let me go ahead and see what other options I have here.

通常一开始把电离能最低的原子,放在中心位置就很好了，如果你发现电荷没有分开,那么这个结构就没问题了，但是如果你发现有很多分开的电荷，比如这种情况，有负二，正二和负一，那么你会想要说等一下，从形式电荷来看这很不好，让我去看看其它可能的选择。

麻省理工公开课 - 化学原理课程节选

So, put the sulfur in the center.

把S放在中心。

麻省理工公开课 - 固态化学导论课程节选