1
the headlamp(s) of [vehicle]
headlamp 是可数名词；指汽车的一对前灯时常用复数 headlamps。
The headlamps of the truck were covered in mud.
卡车的前灯上沾满了泥。
前灯；车头灯
先理解核心含义，再看它在真实句子里的用法。
前灯；车头灯
a powerful light on the front of a vehicle, such as a car or locomotive
The headlamps of the truck were covered in mud.
卡车的前灯上沾满了泥。
一个单独的前灯,尤指机动车辆的。
An individual headlight, particularly of a motor vehicle.
戴在头上的手电筒。
A flashlight worn on the head.
I couldn't see the road clearly because the car's left headlamp had stopped working.
因为汽车左前灯不亮了，我看不清路。
The driver turned on the headlamps as soon as it began to get dark.
天一开始变黑，司机就打开了前灯。
The train's headlamp lit up the track far ahead.
火车的前灯照亮了前方很远的轨道。
headlamp 是可数名词；指汽车的一对前灯时常用复数 headlamps。
The headlamps of the truck were covered in mud.
卡车的前灯上沾满了泥。
turn on/off 是可分短语动词；宾语为代词时必须放在中间，如 turn them on/off。
Turn on your headlamps when you enter the tunnel.
进入隧道时打开你的前灯。
此处 headlamp 指戴在头上的照明灯，不是车灯。
The miner wears a headlamp on his helmet.
矿工在头盔上戴着一盏头灯。
The car's headlamps illuminate the road ahead.
汽车的前灯照亮前方的道路。
Not this
The car has two headlamp.
Use this
The car has two headlamps.
headlamp 是可数名词，two 后需要用复数形式 headlamps；中文名词没有复数标记，所以容易漏掉 -s。
Not this
I bought headlamp for my bike yesterday.
Use this
I bought a headlamp for my bike yesterday.
headlamp 是单数可数名词，前面需要加不定冠词 a；中文没有冠词系统，学习者容易遗漏，补上 a 才符合英语语法。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
汽车前灯
He replaced the car headlamp after the accident.
事故后他更换了汽车前灯。
前灯光束
The headlamp beam lit up the dark road.
前灯光束照亮了漆黑的公路。
前灯灯泡
You need a new headlamp bulb for the driver's side.
你需要一个驾驶座一侧的新前灯灯泡。
近光灯
Remember to use dipped headlamps in fog.
雾天记得开近光灯。
前灯清洗器
The car is fitted with headlamp washers that spray water onto the lights.
这辆车装有前灯清洗器，可向车灯喷水。
对向车辆的前灯
The glare of oncoming headlamps made it hard to see.
对向车辆前灯的光线晃得让人看不清。
Use headlamp naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
head（头）+ lamp（灯）→ 装在头部或车头的灯，记住“头顶的灯”就是前灯、头灯。
语域：mixed 常见场景：汽车技术文档、英国英语日常交流、美国英语维修手册 headlamp 在英国英语中比较常见于日常交流，而在美国英语中多用于汽车技术文档或正式场合；日常口语中美国人更常用 headlight。选择时可根据地区和语域调整。
这些词都以 -amp 拼写结尾，发音均为 /æmp/，与 headlamp 末尾的非重读音节同音。注意 lamb（小羊）拼写相近，但读作 /læm/，没有 /p/。
Dictionary facts from ECDICT, WIKTIONARY.