1
lagging + verb (be used, prevent, etc.)
lagging 为不可数名词，做主语时谓语用单数。
Lagging is used to prevent heat loss from pipes.
隔热材料用于防止管道热量流失。
保温材料；隔热材料；隔热层
先理解核心含义，再看它在真实句子里的用法。
保温材料；隔热材料；隔热层
Material used to wrap pipes or boilers, or laid in attics, to prevent heat loss; also the act or process of applying such insulation.
Lagging is used to prevent heat loss from pipes.
隔热材料用于防止管道热量流失。
用毡条、木条等覆盖某物,作为绝缘或保护。
The covering of something with strips of felt, wood etc, either as insulation or for protection.
用于包裹管道、锅炉或铺在阁楼以防止热量损失的保温材料
used to wrap around pipes or boilers or laid in attics to prevent loss of heat
如此使用的材料。
The material so used.
The plumber installed new lagging around the hot water pipes to improve energy efficiency.
水管工在热水管周围安装了新的保温材料，以提高能源效率。
We added extra lagging in the attic to keep the house warmer during winter.
我们在阁楼里增加了额外的保温层，以在冬天保持房屋温暖。
Without proper lagging, the boiler loses a lot of heat.
如果没有适当的保温材料，锅炉会损失大量热量。
lagging 为不可数名词，做主语时谓语用单数。
Lagging is used to prevent heat loss from pipes.
隔热材料用于防止管道热量流失。
常与 install, apply, fit 等动词搭配。
We need to install lagging on the boiler.
我们需要给锅炉安装隔热材料。
Not this
You should wrap the pipe with lag.
Use this
You should wrap the pipe with lagging.
“lag” 作为名词通常指“延迟”或“囚犯”，而非隔热材料。正确应使用 “lagging” 表示隔热材料。
Not this
The lagging pipe is hot to touch.
Use this
The lagging on the pipe is hot to touch.
“lagging” 是名词，意为“隔热层”，不能用作形容词修饰 pipe。正确表达应为 “the lagging on the pipe”。
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