signal
柯林斯词典
1. N-COUNT A signal is a gesture, sound, or action which is intended to give a particular message to the person who sees or hears it. 信号
They fired three distress signals. 他们发射了3次遇难求救信号。
As soon as it was dark, Mrs. Evans gave the signal. 天一黑，埃文斯夫人就发出了那个信号。
2. V-T/V-I If you signal to someone, you make a gesture or sound in order to send them a particular message. (打手势或发声音) 向…示意; 发信号
Mandy started after him, signalling to Jesse to follow. 曼迪开始追赶他，示意杰西跟上。
She signalled to Ted that she was moving forward. 她向特德示意她要向前走。
3. N-COUNT If an event or action is a signal of something, it suggests that this thing exists or is going to happen. 信号
Kurdish leaders saw the visit as an important signal of support. 库尔德领导人把这次访问看作是表示支持的重要信号。
4. V-T If someone or something signals an event, they suggest that the event is happening or likely to happen. 表示
He seemed to be signalling important shifts in U.S. government policy. 他似乎在表示美国政府的政策将会有些重大变化。
5. N-COUNT A signal is a piece of equipment beside a railway, which indicates to train drivers whether they should stop the train or not. 铁路的信号灯
A signal failure contributed to the crash. 信号灯故障导致了这次撞车事故。
6. N-COUNT A signal is a series of radio waves, light waves, or changes in electrical current which may carry information. (传输信息的无线电、光波或电流) 信号
...high-frequency radio signals. …高频无线电信号。
返回 signal
signal /ˈsɪɡnəl/ (signalling,signalled,signals)
剑桥词典
- At a prearranged signal, everyone started moving forwards .
- I usually set my watch by the time signal on the radio .
- At the given signal, the group rushed forward to the barrier .
- I've been trying to call him all evening , but I keep getting the engaged signal.
- A whistle is the signal for the children to line up ready to go into the classroom .
- The picture quality is bad because the TV signal isn't powerful enough.
- The equipment sent out a regular high-pitched signal.
- There is some interference on the signal - do not adjust your set.
signal noun [C] (ACTION)
an action , movement , or sound that gives information , a message , a warning , or an order信号
When she gave (them) the signal, they all cheered . 她发出信号后，他们都欢呼起来。
[ 词或词组后面接一个that从句 ] The fireworks were a signal that the festival had started . 焰火是节日开始的信号。
[ 动词后面接一个带to的不定式 ] The police officer gave us the signal to stop . 警察示意我们停下。
The signal for a race to start is often the firing of a gun . 赛跑常以发令枪响作为开始的信号。
US (UK indicator)
a turn signal
（车辆）转向灯（同 turn signal）
例句
signal noun [C] (WAVE)
a series of electrical or radio waves that are sent to a radio or television in order to produce a sound , picture , or message（用于传输声音、图像或其他信息的）电波信号
范例
signal noun [C] (SHOWING)
something that shows that something else exists or is likely to happen
迹象
The loss is a clear signal of his deteriorating confidence . 比赛输了，这清楚地表明他信心日渐不足。
The changing colour of the leaves on the trees is a signal that it will soon be autumn . 树叶颜色的改变表明秋天即将来临。
signal noun [C] (EQUIPMENT)
equipment , especially on the side of a railway or road , often with lights , that tells drivers to stop , continue , or go more slowly
（尤指铁路或公路上的）信号灯
a railway signal 铁路信号灯
a traffic signal 交通信号灯
a road signal 道路信号灯 返回 signal