signal
signal 英 [ˈsɪgnəl] 美 [ˈsɪɡnəl]
n. 信号； v. 发信号,示意；表达
进行时:signalling 过去式:signalled 过去分词:signalled 第三人称单数:signals 名词复数:signals
- A signal is a gesture or message that people use to communicate with each other. The wave you give a good friend to call her over from across the room and the impulse that transmits your voice through the telephone to your mother are both signals.
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- n. 信号；
- v. 发信号,示意；表达
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1. a danger signal, a warning signal,
危险、警告的信号
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2. At an agreed signal they left the room.
收到约定的信号后，他们离开了房间。
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3. When I give the signal,run!
我一发信号，你就跑！
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4. All I get is a busy signalwhen I dial his number (= his phone is being used).
我什么时候拨他的电话听到的都是忙音。
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5. hand signals
示意手势
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6. traffic signals
交通信号灯
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7. a stop signal
停车信号
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8. a radar signal
雷达信号
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9. to detect/pick up signals
探测╱收到信号
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10. I couldn't get a signalon my cell phone.
我的手机接收不到信号了。
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11. Don't fire until I signal.
等我发出信号后再开枪。
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12. He signalled to the waiter for the bill.
他示意服务员结账。
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13. She signalled him to follow.
她示意他跟她走。
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14. He signalled his discontent by refusing to vote.
他拒绝投票以示不满。
- signal (adj.) "remarkable, striking, notable" ("serving as a sign"), 1640s, from French signalé, past participle of signaler "to distinguish, signal" (see signal (n.)).
- signal (n.) late 14c., "visible sign, indication," from Old French signal, seignal "seal, imprint, sign, mark," from Medieval Latin signale "a signal," from Late Latin signalis (adj.) "used as a signal, pertaining to a sign," from Latin signum "identifying mark, sign" (see sign (n.)). Restricted sense "agreed-upon sign (to commence or desist, etc.) is from 1590s. Meaning "modulation of an electric current" is from 1855.
- signal (v.) 1805, "to make signals to," from signal (n.). Related: Signaled; signaling. Earlier verb was signalize (1650s).
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