1
precautionary measure
常用复数形式 measures，指具体的预防性行动。
The government introduced precautionary measures to prevent flooding.
政府采取了预防措施来防止洪灾。
预防性的；防备的
先理解核心含义，再看它在真实句子里的用法。
预防性的；防备的
precautionary
The government introduced precautionary measures to prevent flooding.
政府采取了预防措施来防止洪灾。
与预防有关的；用作预防的。
Of, pertaining to, or serving as a precaution.
预防性的
taken in advance to protect against possible danger or failure
The company took precautionary measures to protect customer data.
公司采取了预防措施来保护客户数据。
AI contextual example
She kept a first-aid kit at home as a precautionary step.
她在家里放了一个急救箱作为预防步骤。
AI contextual example
The government issued a precautionary warning before the storm arrived.
政府在暴风雨来临前发布了预防性警告。
AI contextual example
gave precautionary advice
提出了预防性建议
WordNet
常用复数形式 measures，指具体的预防性行动。
The government introduced precautionary measures to prevent flooding.
政府采取了预防措施来防止洪灾。
precautionary principle 是固定说法，指在缺乏充分科学证据时仍采取预防性措施的原则。
Many environmental laws are based on the precautionary principle.
许多环境法都基于预防原则。
approach 表示处理问题的方式；precautionary 常用来形容这种谨慎的态度。
We took a precautionary approach and cancelled the trip.
我们采取了预防性做法，取消了这次旅行。
steps 指一系列行动，常用搭配 take steps。
Please take precautionary steps to protect your personal data.
请采取预防性步骤来保护你的个人数据。
Not this
We should take precaution measures before the storm.
Use this
We should take precautionary measures before the storm.
precaution 是名词，不能直接修饰 measures，应使用其形容词形式 precautionary（预防性的）。
Not this
You should do precautionary measures to avoid risks.
Use this
You should take precautionary measures to avoid risks.
与 measures 搭配的动词应是 take，而非 do；这是受汉语“采取”直译的影响。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
预防措施
The government introduced precautionary measures to stop the spread of the disease.
政府采取了预防措施以阻止疾病传播。
预防原则（即使缺乏科学定论也采取防范措施的原则）
Environmental groups rely on the precautionary principle to justify early restrictions.
环保组织依据预防原则为早期的限制措施辩护。
预防性做法；谨慎方针
The committee adopted a precautionary approach to the proposed mining project.
委员会对拟议的采矿项目采取了预防性做法。
预防步骤；防范措施
Please take all precautionary steps to avoid accidents in the lab.
请在实验室采取一切防范步骤以避免事故。
预防性疏散
Precautionary evacuation was ordered before the hurricane arrived.
飓风到来前已下令进行预防性疏散。
预防性封锁
The school announced a precautionary lockdown after a suspicious package was found nearby.
在附近发现可疑包裹后，学校宣布实施预防性封锁。
Use precautionary naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
联想 pre（提前）＋caution（小心）：提前小心防备，precautionary 即“预防性的”。想象登山前备好绳索。
语域：formal 常见场景：正式告示、安全指引、医疗说明 precautionary 通常用于正式或专业语境，多出现在公告、指引或说明中，日常口语里较少见。
只有 'cautionary' (/ˈkɔʃənɛri/) 与 'precautionary' 押韵：重读元音 /ɔ/ 及后面的 /ʃənɛri/ 完全一致。'precaution' 和 'caution' 有相同的拼写和 /ˈkɔʃən/ 发音，但因词尾多了 -ary 而不构成完整押韵。'discretionary'、'stationary' 和 'revolutionary' 虽然有类似的 -tionary 拼写，但重读元音不同，所以不押韵。
Dictionary facts from ECDICT, WIKTIONARY.