This treatment involves scrubbing off the top layer of dead skin.

这种治疗需要把死皮的表层除去。

《牛津词典》

Basal slip or sliding as it's often called, basically refers to the slipping or sliding of a glacier across bedrock, actually across a thin layer of water on top of the bedrock.

底部滑移，也通常被称为滑动，大致指的是冰川在基岩上的滑动，实际上是在基岩上部的一层薄薄的水上的滑动。

youdao

Because of the cold temperatures, the tundra has two layers: top layer, which is called the active layer, is frozen in the winter and spring, but thaws in the summer.

由于寒冷的气温，冻土带有两层：最上面的一层被称为活动层，在冬季和春季被冻结，但在夏季解冻。

youdao

L is for layers.Wearing loose, lightweight clothes, one layer on top of another, is better than wearing a single heavy layer of clothing.

VOA: special.2009.12.23

Now Yorkshire folk are pretty hardy and, in my experience, favour nothing more than one layer on top.

BBC: FA Cup & Premier League as it happened

And then layer on top of that tremendous amounts of design support services.

FORBES: Xilinx FY Q4 Tops Street, As FPGAs Gain Ground; Shrs Rally

That allows an investment bank, for instance, to run a business intelligence (BI) layer on top of its spreadsheets.

FORBES: Solutions To Spreadsheet Risk Post JPM's London Whale