late 14c., "one who or that lays" (especially stones, "a mason"), agent noun from lay (v.). Passive sense of "that which is laid over a surface" first recorded 1610s, but because earliest English use was in cookery, this is perhaps from French liue "binding," used of a thickened sauce. Layer cake attested from 1881.
layer (v.)
1832, from layer (n.). Related: Layered; layering.
实用例句
1. Sensitive Cream will not strip away the skin's protective layer.
敏感肌肤专用面霜不会破坏皮肤表面的保护层。来自柯林斯例句
2. It was hard to see the colours under the layer of dust.
蒙了一层灰尘后颜色就很难看清了。来自柯林斯例句
3. Chemicals form a protective layer that resists both oil and water-based stains.
化学物质形成了一个抗油污和水渍的保护层。来自柯林斯例句
4. The upper layer of felt should overlap the lower.
毛毡的上层应与下层重叠。来自柯林斯例句
5. The top layer of skin has to be grafted onto the burns.
