signal
释义
n. 信号；标志
v. 用信号通知
自然拼读
词态
现在分词：signalling
第三人称单数：signals
过去式：signalled
过去分词：signalled
复数：signals
副词：signally
例句
At a prearranged signal the lights went out.
预定的信号一发出，灯就全灭了。
the lengthening days that signal the end of winter
白昼变长标志着冬天的结束
He pressed the red alarm signal to see if it was on or off.
他按了一下红色报警信号钮，检查一下它是开著的还是关著的。
he whistle signalled the end of the match.
哨声吹响，示意比赛结束。
The whistle signalled the end of the match.
哨声吹响，示意比赛结束。
She signalled, and the waiter brought the bill.
她打了个手势，侍者就拿来了账单。
词组
signal analysis
信号分析
signal detection
信号检测
signal source
n. 信号源
audio signal
声频信号；可听声信号
signal processing
信号处理
traffic signal
交通信号；交通讯号，指挥灯
analog signal
[计]模拟信号
digital signal
数字信号
output signal
输出信号
control signal
控制信号；操纵信号
signal transmission
信号传输；信号发送
speech signal
语言信号，语音信号
input signal
[电]输入信号
digital signal processor
数位讯号处理器
video signal
视频信号
electric signal
电讯号
signal generator
信号发生器；讯号产生机
signal processor
n. 信号处理机；讯息处理者
signal to noise ratio
信噪比，信号噪声比
digital signal processing
数字信号处理
近义
vi.发信号
semaphore
adj.显著的；作为信号的
obvious
prominent
marked
noted
outstanding
n.信号；暗号；导火线
high sign
alarm-word
vt.标志；用信号通知
mark
词根词缀点击查看signal词根词缀
真题
考纲分布
n/v. 信号; 手势; 传达; 示意
考纲释义
n/v. 信号; 手势; 传达; 示意
真题例句
When there is no WiFi or signal for your mobile phone, will you get nervous?
当你的手机没有WiFi或信号时，你会紧张吗？
[2018 甘肃省兰州卷 任务型阅读理解]
It caused radio and satellite signals to go down in some northern cities in China.
它导致中国北方一些城市的无线电和卫星信号下降。
[2018 南宁卷 阅读理解]
When there are fish near a boat, dolphins signal (发信号) to the fishermen to put their nets in the water.
当船附近有鱼时，海豚会向渔民发出信号，让他们把网放入水中。
[2018 江西卷 阅读理解C]
备考派生词
signal
n. 信号；暗号；表示；标志；起因；导火线；信号灯
signature
n. 署名；签名；折标；标记；用法签；识别标志；鲜明特色；签字；书贴
考纲分布
n/v. 信号; 手势; 传达
考纲释义
n/v. 信号; 手势; 传达
真题例句
"It's not going to fix everything, but adaptive signals have some benefits for smaller cities," he says.
他说：“它不会解决一切问题，但自适应信号对小城市有一些好处。”
[2020 浙江卷 阅读理解]
At 9: 30am, the full red/yellow/green signal cycle might be 140 seconds.
在上午9：30，完整的红/黄/绿信号周期可能是140秒。
[2020 浙江卷 阅读理解]
Rani's friendliness —her warm smile, her nods, her 'I'm here for you' attitude—were all silent signals that didn't travel through wires. "
拉尼的友善——她温暖的微笑，她的点头，她的“我在这里等你”的态度——都是无声的信号，不可能通过电线传递。
[2016 全国卷2 完形填空]
备考派生词
signal
n. 信号；暗号；表示；标志；起因；导火线；信号灯
signature
n. 署名；签名；折标；标记；用法签；识别标志；鲜明特色；签字；书贴
signed
v. 签名；打手势；示意；（sign的过去式和过去分词）
1 ...you should be able to signal to them...
2107.12 CET4 听力题
2 ...Were they deliberately tried to signal their rejection of her...
2011.12 CET4 听力题
3 ...the figures on imports and exports seem not to signal a double-dip recession – a renewed decline in the broad level of economic activity in the United States – but an economic expansion...
2011.12 CET6 阅读理解
4 ...Learning how different cultures signal respect can help you avoid misunderstandings...
2011.12 CET4 听力题
5 ...hire a contractor - is one signal that mastering tools and working with one's hands is receding in America as a hobby...
2013.6 CET6 阅读理解
6 ...they deliberately tried to signal their rejection of her...
2011.12 CET4 听力题