Beneath the soil lies a layer of bedrock.

土壤下面有一层基岩。

youdao

When the Nile is in flood, it deposits a layer of mud on the fields.

尼罗河泛滥时，在田野上沉积下一层泥。

《新英汉大辞典》

The archaeologists had to remove a layer or reeds and ropes that covered the burial.

考古学家已经去除了一层覆盖于木乃伊上的芦苇和绳索。

youdao

The Maya poured the chocolate drink back and forth between two containers so that the liquid had a layer of bubbles,or foam.

VOA: special.2010.02.17

If this is the particular kind of axon that is 'myelinated', then it might have a layer of a special substance called myelin in sheathing the axon.

假设这是一种特殊的有髓鞘的轴突,它表面上会像鞘一样地包裹上一层,称为鞘磷脂的特殊物质

耶鲁公开课 - 生物医学工程探索课程节选

But I'm sure you can easily see how these styrofoam balls could, in fact, be a mono layer of gold nuclei.

这个实验怎么工作的,我们先来做些计算，但我相信你们都已经。

麻省理工公开课 - 化学原理课程节选

This flexible demand adds a layer of complexity as to how brands deliver their messages.

FORBES: Are Brands Entering An Era Of 'Truth In Advertising?'

The reality is that partnership adds a layer of frailty to your business venture.

FORBES: To Partner Or Not To Partner? The Answer Is Simple

Then, quite suddenly, 65m years ago, a layer of lava nearly 2km thick appears.

ECONOMIST: Mass extinctions