the early period of human history when people used things such as stone, horn, bone, etc. to make tools
石器时代, 石时代
考古学家发现了一个石器时代的定居点，里面有工具和洞穴壁画。
one of the periods in history when ice covered large parts of the world
冰河时代, 冰川期
长毛猛犸象和剑齿虎是 冰河时代 的标志性动物。
the historical period before the Middle Ages, especially before the sixth century when Greeks and Romans were the most prosperous
古代, antiquity时期
对古代的研究涉及检查古代文本、文物和考古遗迹，以了解过去的文化和社会。
the era in European history commenced at the end of the Roman Empire in AD 476 and lasted until AD 1000
黑暗时代, 中世纪早期
an era in European history, between about AD 1000 and AD 1500, when the authority of kings, people of high rank, and the Christian Church was unquestionable
中世纪, 中古时期
城堡和骑士是中世纪生活中标志性的象征。
the period that began about 1100 BC when people used iron tools for the first time
铁器时代, 铁器时期
在铁器时代，许多社会在农业、战争和建筑方面取得了重大进展。
the period when iron was not discovered and people used bronze to make tools
青铜时代, 青铜时期
在青铜时代，像美索不达米亚和古埃及这样的文明见证了复杂社会和城市中心的兴起。
the branch of science that studies fossils
古生物学
古生物学的进步使科学家能够从化石记录中重建灭绝物种的外观和行为。
relating to the period between around 208 to 146 million years ago, when the largest known dinosaurs lived
侏罗纪的, 与侏罗纪有关的
relating to the period between approximately 146 and 65 million years ago, when dinosaurs lived (until their extinction)
白垩纪的
relating to Greek history, language, and culture, especially the era from the death of Alexander the Great to the defeat of Cleopatra and Mark Antony in 31 BC, during which Greek culture thrived considerably
希腊化的
a philosophical movement in the late 17th and 18th centuries that emphasized reason and science were of more importance than tradition and religion
启蒙运动, 启蒙时代
启蒙运动思想家如伏尔泰和卢梭倡导思想和言论自由。
dating back to the ancient past
古老的, 古代的
她的研究集中在早期美索不达米亚时代的古老艺术形式上。
a person belonging to a people or group regarded as uncivilized, foreign, or outside the dominant culture
野蛮人, 未开化的人
游牧的野蛮人成群结队地穿越平原。
to record a series of historical events in a detailed way by a chronological order
记录, 编年
她通过细致的研究和生动的叙述记录了探险家的旅程。
something occurring at a time when it could not have existed or happened
时代错误, 时间顺序错误
该角色对未来的了解造成了刻意的 时代错误。
the study of civilizations of the past and historical periods by the excavation of sites and the analysis of artifacts and other physical remains
考古学, 研究古代文明
罗塞塔石碑的发现是埃及学和考古学的一个突破，使得古埃及象形文字得以破译。
any territory under the full or partial control of another more powerful nation, often occupied by settlers from that nation
殖民地, 控制下的领土
(plural) the remains of something such as a building after it has been seriously damaged or destroyed
废墟, 遗迹
古老的废墟每年都吸引许多游客。
used typically before a date to show that it is not exact
大约，左右
这座建筑建于circa1850年。
the king or emperor of Russia prior to 1917
沙皇, 沙皇
伊凡雷帝是俄罗斯最著名的沙皇之一，以其专制统治和对敌人无情的策略而闻名。
the political structure during a period in the history of the UK between 1649 and 1660, called the interregnum, during which the country was ruled without a king or queen
英联邦, 共和国
联邦在民主、人权和法治的原则下运作，在其成员国之间促进这些价值观。
