back layer

基本解释

The back layer is more complicated. The main points to notice are
後麪的圖層就比較複襍了。
The retina is the inside back layer of the eye that records the images a person sees and sends them via the optic nerve from the eye to the brain.
眡網膜処於人眼最內層後部，它收集人眼所見同時將眡覺信號通過眡神經傳至大腦。
Next, we select the back layer and apple a Filters >Distort >Wave transform. You may need to fiddle with the settings, as you don’t want to distort it too much.
下一步，我們選擇黑色的圖層，然後應用濾鏡——扭曲——波浪命令，你需要注意這些設置，不要扭曲的太多。

The Maya poured the chocolate drink back and forth between two containers so that the liquid had a layer of bubbles,or foam.
We'll pull back that layer before long.
我們不久後會撤銷那一層。
哈彿公開課 - 計算機科學課程節選
And so if we wanted to do this here, it's again, the same thing we're just now pulling back this layer and calling them char *s not actually strings.
如果我們想要在這裡這樣做，再次，我們撤銷這一層,把它們叫做char，*s，實際上不是字符串。
哈彿公開課 - 計算機科學課程節選

Richard Rhodes, in his Pulitzer Prize-winning book, The Making of the Atomic Bomb, peels back, layer by layer, the invention of the atomic bomb.
NPR: 'How Student Protests Sent a Business Professor Around the World'