... technology is flourishing, it underwent New Stone age, Broze age（青铜器时代）,Iron Age(铁器时代)，Cement age(水泥时代)、Steel age、Semiconductor age（半导体时代），and now we are in the age of new material.
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The compressive strength of concrete at an age t depends on the type of cement, temperature and curing conditions.
时间t时的抗压强度与水泥种类，温度以及养护条件有关。
When modern Western art lived in the Industrial Age, we clearly felt the influence and even coercion of metal machines and cement buildings upon it.
现代西方艺术生活在工业时代，我们明显感到金属机械与水泥建筑对它的影响乃至逼迫。
The long-term expansion potential due to AAR of alkaline cement system is discussed with measuring the change of AAR expansion ratio of mortar at different age.
通过测定砂浆经不同养护阶段的碱集料反应膨胀率变化，探讨了碱性水泥系统碱集料反应的长期膨胀潜力。
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