The exhibit discusses the Opium Wars that took place in the middle of the nineteenth century.

VOA: special.2010.03.03

So in one case, we could actually put carbon in the middle, in one place, we could put sulfur in the middle, and in one case we could put nitrogen.

那么有一种情况是，我们把碳放在中间，还有一种情况是，把硫放在中间，另外一种情况是把氮放在中间。

麻省理工公开课 - 化学原理课程节选

Some place in the middle is where the truth is, and it's hard to find.

事实往往在两种极端的中间,想找到它并不容易

耶鲁公开课 - 古希腊历史简介课程节选

Experts say the best place to be is in a small room, without windows, in the middle of the lowest part of a building.

VOA: special.2009.06.09

No, they grow up like the Athenian does, right smack in the middle of a plain, which is a good place for farming, with a great high acropolis available.

它们和雅典的扩展方式类似,在一个平原的中心扎根,因为那里适合农业生产,然后建起一座高大的卫城

耶鲁公开课 - 古希腊历史简介课程节选

Place a closed hand over the middle of your abdomen just above your waist.

VOA: special.2009.08.11