Joana Lia Ferreira, an assistant professor of conservation and restoration at the NOVA School of Science and Technology, notes that archaeologists first defined the great material ages of human history—Stone Age, Iron Age, and so on—after examining artifacts in museums.
新大学科学与技术学院的文物保护与修复助理教授Joana Lia Ferreira指出，考古学家最初是在博物馆中研究文物后，才定义了人类历史上的主要材料时代——石器时代、铁器时代等等。
The likely explanation is that the withdrawal was rushed, and they didn't want the local Caledonians getting their hands on 10 tons of weapons-grade iron.
可能的解释是，这次撤退是仓促进行的，他们不想让当地的卡莱多尼亚人得到十吨用于制造武器的铁。
According to Sichel, although the falling price of nails was driven partly by cheaper iron and cheaper energy, most of the credit goes to nail manufacturers who simply found more efficient ways to turn steel into nails.
根据西格尔的说法，尽管钉子价格的下降部分是由于铁和能源成本的降低，但大部分功劳应归于钉子制造商，他们只是找到了更有效的方法将钢转化为钉子。
例句取自历年考研英语真题，翻译为机器生成，仅供学习参考。