Jayhawkers were free-state guerrilla fighters opposed to the pro-slavery fighters in the years before the Civil War.

VOA: special.2009.08.09

One of the things that estrogen does when cells are exposed to estrogen is that certain genes get turned on that weren't turned on in the estrogen-free state.

雌激素的功能是,当细胞所处环境中有雌激素时,一些在雌激素不存在的条件下,无法表达基因就能够表达

耶鲁公开课 - 生物医学工程探索课程节选

The pro-slavery governor and the Free State governor agreed to hold an emergency meeting.

VOA: special.2009.05.07

At the same time,groups in the North helped free-state settlers move there,too.

VOA: special.2009.04.30

They wanted a vote before too many free-state settlers moved in.

VOA: special.2009.04.30

The mid-Atlantic state of Maryland is called the Free State.

VOA: special.2009.08.16

Free-state leaders were extremely angry.

VOA: special.2009.04.30

But resources are limited in this post-conflict state where the education sector says it needs almost $250 million to meet the goal of free basic education for all children.

VOA: standard.2010.02.25