n.(尤指岩石或土壤的)下层，底层
substratum的复数

原形：substratum复数：substrata

The substratum of this region is primarily granite.
这个地区的地基主要是花岗岩。
The old language still survives as a substratum in the modern dialect.
古老的语言在现代方言中仍作为底层结构存在。
The substratum of our culture is deeply rooted in agriculture.
我们文化的基础深深植根于农业。
The linguistic substratum influenced the development of the new language.
语言底层的影响了新语言的发展。
The archaeologists are studying the prehistoric substratum beneath the city.
考古学家正在研究城市下方的史前地层。
The substratum of his beliefs was shaped by his childhood experiences.
他的信念根基由童年经历塑造。
The substratum rock is exposed in some areas due to erosion.
侵蚀使得某些地区的底层岩石裸露。
The substratum of the forest provides essential nutrients for plant growth.
森林的地基为植物生长提供必要的养分。
The substratum of the coral reef is made up of calcium carbonate.
珊瑚礁的底层是由碳酸钙构成的。
The indigenous culture forms the substratum upon which the colonial culture was built.
本土文化构成了殖民地文化的基石。