1.
a major division of geological time; an era is divided into two or more periods.
地质时期的主要分期；一代分为两个或多个纪。
2.
Of or relating to geologic periods that precede the appearance of life.
无生的生命出现之前的地质时期的或与生命出现之前的地质时期有关的
3.
the quaternary period of geologic time extends from the end of the tertiary period to the present.
地质时期中的第四纪是从第三纪一直到现在。
4.
Era A unit of the geological time scale that is made up of several periods, e.g. the Mesozoic Era comprises the Triassic, Jurassic, and Cretaceous periods.
代：量度地质时期的分类单位，代由若干时期组成，如中生代包括三叠纪、侏罗纪和白垩纪。
5.
The longest division of geologic time, containing two or more eras.
万古地质时期中最长的分段，包括两个或两个以上的代
6.
COORDINATED BIOTIC AND ENVIRONMENTAL EVOLUTION IN THE EARTH HISTORY AND THE DISTRIBUTION OF FOSSIL FUEL
地质时期生物与自然协调演化及化石燃料资源的分布规律
7.
a unit of geological time during which a system of rocks formed.
地质上的分期，指岩石形成的时期。
8.
Hydrogeological study cf Sanshan island gold mine in development period
三山岛金矿开拓时期的水文地质研究
9.
Guiding Ideology for Substantial Geological Material Management in the New Perio d;
新时期实物地质资料管理的指导思想
10.
Question on Considering Ming and Qing Dynasty as the Center of the World Economy;
明清时期中国世界经济中心地位质疑
11.
Reflections on Quality Education of College Students in Ethnic Area;
浅谈新时期少数民族地区高校学生素质教育
12.
Analysis of the Relationship between the Drought and the Population Quality in the Midst of Shaanxi in the Republic of China;
民国时期三年大旱与关中地区人口质量探析
13.
The Position,Character and Function of Putonghua in the New Age;
新时期条件下普通话的地位、性质与功能
14.
Political Work in The Army and the Principle of Material Interests during the Agrarian Revolution;
土地革命时期我军政治工作与物质利益原则
15.
Analysis of Financing Model and Obstacles and Countermeasures concerning China's Geological Park in the New Period
新时期我国地质公园融资模式及障碍对策探析
16.
Effect of Seeding and Planting Period on the Rice Yield and Quality in Cold Region
寒地水稻插秧时期对产量与品质的影响
17.
cryogenic period
【地质】低温冻结期
18.
The historian dates by years, the geologist by millions of years
历史学家以年为单位划分历史时期，地质学家以百万年为单位划分地质期。