the underlayer of [noun]
The underlayer of the painting was made of canvas.
这幅画的底层由帆布制成。
截脉竖井；底层铺设者；下层；底层；位于另一层之下的层。；为在所需深度切割矿脉而开凿的垂直竖井。；铺设底层的人。
下层；底层；位于另一层之下的层。
A layer that is below another layer.
为在所需深度切割矿脉而开凿的垂直竖井。
A perpendicular shaft sunk to cut the lode at any required depth.
铺设底层的人。
One who underlays.
The carpet has a thick underlayer that keeps the floor warm.
这块地毯有一层厚厚的底层，能保持地板温暖。
用法提示：此处 underlayer 是名词，指位于另一层下方的层。
Painters often apply an underlayer before the final coat.
油漆工通常在最后一道漆之前先涂一层底漆。
用法提示：underlayer 作名词，表示涂在表层之下的底层。
The archaeologists found an underlayer of clay beneath the stone floor.
考古学家在石头地板下面发现了一层黏土。
用法提示：underlayer 是名词，意为“下层、底层”。
The underlayer of the painting was made of canvas.
这幅画的底层由帆布制成。
This fabric serves as an underlayer to protect the skin.
这种织物作为衬层保护皮肤。
指采矿术语中的垂直矿井。
The miners drilled an underlayer to reach the ore vein.
矿工们钻了一个垂直矿井以到达矿脉。
grammar · medium
易错句子We need to underlayer the carpet first.
正确表达We need to lay an underlayer for the carpet first.
“underlayer”是名词，不能直接作动词使用。汉语中常将“底层”直接用作动词，但英语中需用“lay an underlayer”表达“铺设底层”。
grammar · medium
易错句子The underlayer cause is still unknown.
正确表达The underlying cause is still unknown.
“underlayer”是名词，意为“下层”；而“underlying”是形容词，意为“根本的、潜在的”。此处应使用形容词“underlying”修饰“cause”。
underlayer指任何下层或底层，underlay特指铺在地板或地毯下的垫层
Choose the next layer that will help you use underlayer with more confidence.
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