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》

This treatment is for the top layer.

对顶部图层作处理。

youdao

Make a new duplicate from the top layer.

复制顶部图层。

youdao

The top layer contains hundreds of control channels through which pressurized water is pumped.

FORBES: Science Beyond Belief

Some particles, however, are energetic enough to puncture the top layer and strike the second layer.

ECONOMIST: Orbital debris

This melt water has a relatively low density, so it accumulates in the top layer of the ocean.

BBC: Melt may explain Antarctica's sea ice expansion