layers
A layer of a material or substance is a quantity or piece of it that covers a surface or that is between two other things.
the depletion of the ozone layer.
臭氧层的消耗。
The eyelids are protective layers of skin.
眼睑是有保护作用的皮肤层。
If something such as a system or an idea has many layers, it has many different levels or parts.
Critics and the public puzzle out the layers of meaning in his photos.
评论家和公众苦思冥想,悟出了他照片中的层层含意。
layers , layering , layered
If you layer something, you arrange it in layers.
Layer half the onion slices on top of the potatoes.
把一半洋葱片一层层地放在土豆上。