年代

• The oldest rocks are generally the most deeply buried .
  按照一般的规律，埋藏最深的岩石年代最为久远。
• The debate raged throughout the 1760s and 1770s .
  激烈的争论贯穿了十八世纪的整个六十年代和七十年代。
• Scientists have dated the fossils by their bone structure .
  科学家根据那些化石的骨骼结构确定其年代。
• In fact, this was a genuine little wartime romance .
  事实上，这是一段名副其实的战争年代的小小罗曼史。
• The expertise became relatively widespread by the mid-1960 .
  这种成就在60年代中期相对地得到广泛发展。
• We call " ancient " something that existed a long time ago .
  “ancient”用以形容经历了久远年代的事物。
• At this distance of time it is difficult to date the fossil .
  时间隔得这么久了，很难确定这化石的年代。
• During the 1940s smedley produced her most important work .
  史沫特莱在四十年代写出了她的最重要的著作。
• In the 1960s the ic market was broadly on bipolar transistors .
  六十年代集成电路市场主要为双极型晶体管。
• In asia total public expenditures tripled during the 1960s .
  60年代，亚洲国家用于教育的开支增加了两倍。