Phrase
alarm system
noun
报警系统
a set of electronic devices that detect intruders or emergencies and alert people
用于防盗或火灾等紧急情况
- 1.
A burglar alarm.
防盗报警器
防盗报警器
In use
The new office building has a state-of-the-art alarm system that detects both smoke and intrusion.
She forgot to activate the alarm system before leaving the house.
Many homeowners install an alarm system to protect their property.
install/set up an alarm system
常与不定冠词连用，表示首次提及。
We decided to install an alarm system in our new house.
我们决定在新房子里安装一个报警系统。
activate/deactivate the alarm system
使用定冠词指代双方已知的特定系统。
Remember to activate the alarm system before leaving the office.
离开办公室前记得激活报警系统。
the alarm system goes off/is triggered
描述报警系统被触发或启动。
The alarm system went off when a window was broken.
窗户被打破时报警系统响了起来。
Common mistakes
I need alarm system for my house.I need an alarm system for my house.
「alarm system」是可数名词短语，在单数形式前需要加不定冠词 an，因为 alarm 以元音音素开头。
My house has alarm.My house has an alarm system.
表示整套报警系统时，应使用完整的短语「alarm system」，而非单独使用「alarm」，后者通常指单个报警器或警报声。
Connections
Confusing words
- alarm
- 警报；报警器 · alarm 指单个的警报装置或警报声，而 alarm system 指一整套系统。
- security system
- 安全系统 · security system 范围更广，包括监控、门禁等，而 alarm system 特指报警系统。
- burglar alarm
- 防盗报警器 · burglar alarm 是 alarm system 的一种，专门用于防盗，而 alarm system 可包括火警等。
Word family
- alarm systems
- plural
Learner notes
Grammar Note
可数名词，常与冠词连用
Learn the forms together
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, WIKTIONARY.