And it increased the military strength of the Union by making it possible for free blacks to serve in the northern army.

VOA: special.2009.02.09

Try to do it as fast as possible without making any mistakes.

要快而不出错。

耶鲁公开课 - 心理学导论课程节选

Though a large percentage of those victims are yet to be identified, DNA testing is making it increasingly possible to determine the identity of remains found in unmarked graves.

VOA: standard.2009.12.18