Word · CEFR B1 · Frequency #1960
Fully loadedsignal
信号；手势；暗号；预兆
A gesture, sound, or action that conveys information or gives notice of something.
指用动作、声音等传达信息的方式，也可指预示某事发生的迹象。
- 1.
A sequence of states representing an encoded message in a communication channel.
通信信道中表示编码消息的状态序列
- 2.
any nonverbal action or gesture that encodes a message
任何传达信息的非语言动作或手势
- 3.
Any variation of a quantity or change in an entity over time that conveys information upon detection.
随时间变化的量或实体状态,检测后传递信息
- 4.
any incitement to action
任何促使行动的刺激
- 5.
A sign made to give notice of some occurrence, command, or danger, or to indicate the start of a concerted action.
为通知、命令、危险或协调行动而发出的信号
- 6.
an electric quantity (voltage or current or field strength) whose modulation represents coded information about the source from which it comes
表示来自源的编码信息的电量(电压、电流或场强)
- 7.
信号；电信号；信号灯；信号装置；诱因；刺激；有效信息；有用信号；细胞信号传导
In use
She gave me a signal to start the presentation.
The referee's whistle was the signal for the players to stop.
He raised his hand as a signal that he needed help.
signals from the boat suddenly stopped
he awaited the signal to start
the victory was a signal for wild celebration
signal to do sth
The referee gave a signal to start the game.
裁判发出了开始比赛的信号。
signal of sth
Connections
Collocations
- send a signal
- 发送信号
- The device sends a signal to the receiver.该设备向接收器发送信号。
- receive a signal
- 接收信号
- We cannot receive any signal from the satellite.我们无法接收来自卫星的任何信号。
- strong signal
- 强信号
- A strong signal indicates good connectivity.强信号表示连接良好。
- clear signal
- 清晰的信号
- Make sure you have a clear signal before making a call.打电话前确保信号清晰。
- signal to do something
- 做某事的信号
- The green light is a signal to go.绿灯是前进的信号。
- signal of something
Learner notes
Memory Tip
谐音'西格诺'，联想为西方传来的信号。
Context & Register
通信技术, 日常手势, 交通信号
Grammar Note
作为名词，signal是可数名词，有复数形式signals。
Pronunciation & Spelling
None of these words rhyme perfectly with 'signal' (/ˈsɪɡnəl/). They all share the spelling chunk '-nal', but the vowel sounds differ (e.g., /aɪ/ in 'final', /ɪ/ in 'criminal', /ɜː/ in 'journal', /æ/ in 'canal'). Be careful not to assume the same pronunciation from the spelling.
High-value vocabulary
该词属于 Oxford 核心词汇，值得优先掌握常见搭配和句型。
Usage priority
Collins 词频等级为 3，建议结合例句记忆，而不是只背中文释义。
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 DICTIONARY_API_DEV, ECDICT, OCTANOVE, WIKTIONARY, WORDNET.