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。
信号；手势；暗号；预兆
signals — plural of signal
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
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。
通信信道中表示编码消息的状态序列
A sequence of states representing an encoded message in a communication channel.
任何传达信息的非语言动作或手势
any nonverbal action or gesture that encodes a message
随时间变化的量或实体状态,检测后传递信息
Any variation of a quantity or change in an entity over time that conveys information upon detection.
任何促使行动的刺激
any incitement to action
为通知、命令、危险或协调行动而发出的信号
A sign made to give notice of some occurrence, command, or danger, or to indicate the start of a concerted action.
表示来自源的编码信息的电量(电压、电流或场强)
an electric quantity (voltage or current or field strength) whose modulation represents coded information about the source from which it comes
用于向他人指示的开关灯、旗语等装置
An on-off light, semaphore, or other device used to give an indication to another person.
为传递信息、减少不确定性而采取的行动或变化
An action, change or process done to convey information and thus reduce uncertainty.
迹象；预示；征兆
A token; an indication; a foreshadowing; a sign.
有用信息(相对于噪声)
Useful information, as opposed to noise.
细胞间的信号传递
A signalling interaction between cells
She gave me a signal to start the presentation.
她给我打了个手势，示意我开始演示。
用法提示：signal 是名词，指传达信息的动作或手势。
AI contextual example
The referee's whistle was the signal for the players to stop.
裁判的哨声是示意球员停下的信号。
用法提示：signal 是名词，指促使行动的提示信号。
AI contextual example
He raised his hand as a signal that he needed help.
他举起手作为需要帮助的信号。
用法提示：signal 是名词，指传达需求的手势。
AI contextual example
The referee gave a signal to start the game.
裁判发出了开始比赛的信号。
The sudden drop in temperature is a signal of approaching winter.
气温骤降是冬天临近的信号。
His resignation was a signal that the company was in trouble.
他的辞职是公司陷入困境的信号。
泛指任何示意信号，比 signal 更通用，可包含言语符号；signal 强调特定约定信号。
多指表演或对话中的暗示信号，强调触发后续动作，不如 signal 广泛。
更正式，强调作为证据或表明某事的信号，不一定是约定符号。
常指显示某种状态或趋势的设备或信号，不如 signal 灵活。
特指用于导航或警告的信号，语义狭窄。
grammar · medium
易错句子The traffic sign turned red, so I stopped.
正确表达The traffic signal turned red, so I stopped.
错误：将 'signal' 误用作 'sign'。交通信号灯应用 'traffic signal'，而 'sign' 通常指标志牌或标记。改正后使用正确的名词 'signal'。
grammar · medium
易错句子He gave a signal of help when he was in danger.
正确表达He gave a signal for help when he was in danger.
错误：介词搭配错误。表示'求救信号'时，应使用介词 'for'，即 'signal for help'，而非 'of'。改正后使用正确介词。
作为名词，指通信或信号处理中干扰或掩盖有意义信息的无意义数据。
sign 常指静态的标志或迹象，而 signal 指动态的信号或暗号
symbol 表示代表某种概念的抽象符号，signal 是传递具体信息的信号
发送信号
The device sends a signal to the receiver.
该设备向接收器发送信号。
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。
强信号
A strong signal indicates good connectivity.
强信号表示连接良好。
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。
做某事的信号
The green light is a signal to go.
绿灯是前进的信号。
某事的信号
Dark clouds are a signal of an approaching storm.
乌云是暴风雨即将来临的信号。
发出信号
The government is sending a signal that it will not tolerate tax evasion.
政府正在发出信号，表示不会容忍逃税行为。
矛盾信号
I'm getting mixed signals from him—he says he likes me but never calls.
我接受到他的矛盾信号——他说喜欢我，但从不打电话。
意图信号
The early election is a clear signal of intent to push through reforms.
提前选举是推动改革意图的明确信号。
信号！烽火点燃了！
In 'The Lord of the Rings: The Return of the King', Pippin cries this as the beacons of Gondor are lit, alerting Rohan to send help.
在《指环王：王者归来》中，皮平喊出这句台词，当时刚铎的烽火被点燃，提醒洛汗国出兵援助。
信号到了。
In 'The Hunger Games', the countdown begins when the signal sounds, marking the start of the games.
在《饥饿游戏》中，信号响起时倒计时开始，标志着游戏正式开始。
Dictionary facts from DICTIONARY_API_DEV, ECDICT, OCTANOVE, WIKTIONARY, WORDNET.