underlay

剑桥词典

thick material put between a carpet and the floor for extra comfort and to protect the carpet
（起保护作用的）地毯衬垫

a layer of material that lies under another one, especially when it can be seen through the top layer
（尤指可以透过上层材料看到的）下层材料，衬里
The dress was black lace with a blue underlay showing through. 那件裙子是用黑色蕾丝和若隐若现的蓝色衬里做的。 返回 underlay