paleolithic age是什么意思

用法例句

Through the example analysis of rebuilding an old stone arch bridge, the article introduces the use performance of the old bridge and the evaluation method of the working status, and sets forth the scheme design, construction steps and construction cautions of rebuilding the old bridges.

该文通过对某旧石拱桥改造的实例分析,介绍了旧桥使用性能和工作状态的评价方法,阐述了旧桥改造的方案设计、施工步骤及施工注意事项。

A Report on the 1993 Excavation of Xianrendong Paleolithic Site in Huadian,Jilin;

吉林桦甸仙人洞旧石器遗址1993年发掘报告

The Daguling Paleolithic locality is situated at the second terrace of the Yuanshui River,a branch of the Ganjiang River in the Xinyu City,Jiangxi Province.

本文通过对江西新余打鼓岭旧石器地点及邻近地区沉积物的系统采样分析和石英电镜扫描观察 ,探讨其沉积学特征和环境意义 ,提出打鼓岭含石制品的中、上部沉积物为风尘堆积 ,性质与北方典型黄土和长江下游土状堆积相似 ,石制品应为原生就地埋藏。