quaternary period
第四纪
同义词
参考例子
1.Jiaxing area belongs to representative lacustrine plain zone. Its Quaternary period stratum has several evident sediment cycles "soft to hard".
中文摘要： 嘉兴地区为典型的湖积平原，第四系地层具有多个明显“软-硬”交替的沉积旋回。
2.The Mesozoic volcanic rock is developed and in sea section, the sediment of Quaternary period is huge-thick, with complicated types and gravel commonly.
海区则形成较厚的第四纪沉积物，其岩土类型复杂，而且多数土层中含砾石量较大。
3.Therefore, the area is typical to study the environmental change of China , even of the globe since Quaternary Period, especially since the Holocene Epoch.
所以该地区是研究第四纪以来，特别是全新世以来中国及全球环境变化的典型地区。
英文解释
n.
1.last 2 million years
网络释义
Quaternary period
第四纪; 第四; 第四纪(二百万年前迄今);
quaternary glacial period
第四纪冰期;
the soil horizon of Quaternary period
第四纪土层;