Definition
n.
rock stratumrock formation
Examples
- 岩层。Zhèxiē yán céng xíngchéng yú yìwàn nián qián.These rock strata formed billions of years ago.
- 岩层。Yánjiū yán céng kěyǐ zhīdào dìqiú de biànhuà.Studying rock strata can tell us about changes to the Earth.
- 岩层。Zhè zuò shān yóu duō céng yán céng zǔchéng.This mountain is composed of multiple layers of rock strata.
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