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a/an + caustic
caustic 作为可数名词，表示一种腐蚀性物质。
A caustic can cause severe burns.
腐蚀剂会导致严重烧伤。
腐蚀剂
caustics — plural of caustic
先理解核心含义，再看它在真实句子里的用法。
腐蚀剂
any chemical substance that burns or destroys living tissue
A caustic can cause severe burns.
腐蚀剂会导致严重烧伤。
任何能烧灼或破坏活组织的化学物质
any chemical substance that burns or destroys living tissue
The lab technician carefully handled the caustic to avoid any spills.
实验室技术员小心处理腐蚀剂，以防溅洒。
Caustics are often used in industrial cleaning processes.
腐蚀剂常用于工业清洁过程。
The factory stored caustics in sealed containers to prevent accidents.
工厂将腐蚀剂存放在密封容器中，以防事故发生。
caustic 作为可数名词，表示一种腐蚀性物质。
A caustic can cause severe burns.
腐蚀剂会导致严重烧伤。
The caustic was stored safely.
腐蚀剂被安全储存。
These caustics are highly dangerous.
这些腐蚀剂非常危险。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
苛性钠
Caustic soda is used in many industrial processes.
苛性钠用于许多工业过程。
腐蚀性溶液
Handle the caustic solution with extreme care.
小心处理腐蚀性溶液。
腐蚀性化学品
Spills of caustic chemicals must be neutralized immediately.
腐蚀性化学品的泄漏必须立即中和。
腐蚀性灼伤
He suffered a caustic burn from the acid.
他因酸液遭受了腐蚀性灼伤。
腐蚀剂
The lab stores caustic agents in a locked cabinet.
实验室将腐蚀剂存放在带锁的柜子里。
Use caustics naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
语域：mixed 常见场景：化学实验室、工业清洗、材料科学 作为名词时指腐蚀剂，多见于化学、工业等专业领域，属于技术性用法。
常指强碱或强酸类腐蚀剂，可数名词，复数形式为caustics。
Words like 'plastic', 'drastic', and 'elastic' share the '-stic' ending and rhyme with 'caustic'.
Collins 词频等级为 1，建议结合例句记忆，而不是只背中文释义。
页面下方列出了常见词形变化。学习时注意它们在句子中的语法位置。
Dictionary facts from ECDICT.