The Portland Cement Association says the gas from the limestone is reabsorbed as concrete ages.

VOA: special.2009.12.01

People have done experiments through the ages, and they've accumulated the knowledge from these experiments, and they've synthesized these experiments into a few basic empirical rules, empirical laws, which are the laws of thermodynamics.

很长的时期内，人们做了大量的实验，从这些实验中积累知识,将这些实验总结成一些基本的经验法则和定律，这就是热力学的定律,然后，人们给这些定律添加，数学架构。

麻省理工公开课 - 热力学与动力学课程节选

Typically, we speak of the Bronze Age, the Mycenaean Period and so on, followed by the Dark Ages, but after that,you started having refined terms which derive actually from the world of the history of art.

通常,我们会说,青铜时代,迈锡尼文明时代,等等,之后是黑暗时代,但是在那之后,开始有精确的术语来界定时代,这些术语实际上源于艺术史的领域

耶鲁公开课 - 古希腊历史简介课程节选

From the amount of soot above it, it seemed to have been burning for ages.

VOA: special.2009.09.26

Climbers in the study were from ages two to seventy-four.

VOA: special.2009.12.09

More than 3 million players in the US, from the ages of 5 to 19, are registered in youth football programs and that number is rising.

VOA: standard.2010.06.15

Almost all of the blood collected by the National Blood Transfusion Services comes from high school and university students between the ages of 17 and 25.

VOA: standard.2010.06.04

Kevin Kern explains why so many people,of all ages and from every corner the world, feel compelled to make the journey to the gates of 3764 Elvis Presley Boulevard.

VOA: standard.2010.01.07

"The Temple Mount was open to Muslims that wanted to come and pray only from the age of 50 upwards, and women of all ages, This was necessary to prevent any disturbances from taking place on the Temple Mount."

VOA: standard.2009.10.05