1
be an insulator
用于说明材料具备绝缘性质；insulator 前可加 good、electrical、thermal 等形容词。
Plastic is an insulator, so it does not conduct electricity.
塑料是绝缘体，因此不导电。
绝缘体
insulators — plural of insulator
先理解核心含义，再看它在真实句子里的用法。
绝缘体
a material that does not conduct electricity or heat well
Plastic is an insulator, so it does not conduct electricity.
塑料是绝缘体，因此不导电。
不传导热(热绝缘体)、声(声绝缘体)或电(电绝缘体)的物质。
A substance that does not transmit heat (thermal insulator), sound (acoustic insulator) or electricity (electrical insulator).
不传导声、热或电的非导电结构、涂层或装置(见图)。
A non-conductive structure, coating or device that does not transmit sound, heat or electricity (see image)
安装绝缘材料的人。
A person who installs insulation.
Rubber is a good insulator, so it is often used to cover electrical wires.
橡胶是良好的绝缘体，因此常被用来包裹电线。
The ceramic insulator on the power pole prevents electricity from leaking into the ground.
电线杆上的陶瓷绝缘子防止电流泄漏到地面。
Thick wool can act as an insulator, keeping warmth inside your coat.
厚羊毛可以起到绝缘体的作用，把热量保留在外套里。
用于说明材料具备绝缘性质；insulator 前可加 good、electrical、thermal 等形容词。
Plastic is an insulator, so it does not conduct electricity.
塑料是绝缘体，因此不导电。
act as 强调“起……作用”，后接表示用途或身份的名词。
The air gap acts as an insulator against heat loss.
空气间隙起到隔热体的作用，防止热量散失。
as 后接 insulator；如需说明具体性质，可在 insulator 前加形容词，如 an effective insulator。
They use rubber as an insulator around the wires.
他们用橡胶作电线周围的绝缘体。
Not this
Glass is insulator, so it is used to cover electric wires.
Use this
Glass is an insulator, so it is used to cover electric wires.
insulator 是可数名词，单数形式不能光杆使用，前面需要不定冠词 an；这里表示“一种绝缘体”。
Not this
There are many insulator on the electric pole.
Use this
There are many insulators on the electric pole.
many 后接可数名词复数，insulator 的复数形式是 insulators，因此要加 -s。
Not this
A insulator prevents electrical current from flowing.
Use this
An insulator prevents electrical current from flowing.
insulator 以元音音素 /ɪ/ 开头，不定冠词要用 an 而不是 a。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
电绝缘体
Rubber is commonly used as an electrical insulator.
橡胶常被用作电绝缘体。
绝热体；热绝缘体
Mineral wool is an effective thermal insulator.
矿棉是有效的绝热体。
瓷绝缘子
Porcelain insulators support high-voltage wires.
瓷绝缘子支撑着高压电线。
玻璃绝缘体
A glass insulator prevents current from leaking.
玻璃绝缘体防止电流泄漏。
良好的绝缘体
Plastic is a good insulator, so it is used to coat wires.
塑料是良好的绝缘体，因此用于包裹电线。
起绝缘体作用
A layer of trapped air acts as an insulator.
一层滞留的空气起绝缘体作用。
Use insulators naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
把“insulate（隔绝）”加上表示物体的“-or”，联想“把电或热隔绝在里面的物体”就是绝缘体。
语域：formal 常见场景：电气工程、材料科学、物理实验 通常用于正式或技术语境，多出现在电气工程、材料科学等专业讨论中；日常口语较少用到。
这组词和 insulator 一样以 -ator 结尾，末尾都读 /eɪtə/（美式英语常读 /eɪtər/）。注意 senator /ˈsenətə/ 拼写相近，但末尾并不读 /eɪtə/。
Dictionary facts from ECDICT, WIKTIONARY.