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IELTS BNC: 1960 COCA: 2078
signal

noun¹

1sign/action/sound that sends a message標誌;動作;聲音ADJECTIVE | VERB + SIGNAL | SIGNAL + VERB | PREPOSITION ADJECTIVEclear, unmistakable清晰的/明確無誤的信號agreed, prearranged約好的/事先約定的信號conflicting, confusing, contradictory, mixed相互衝突的信號;讓人迷惑不解的信號;有歧義的信號wrong錯誤信號Laughing when you should be crying sends out the wrong signals to people.應該哭的時候卻笑,就向人們傳達了錯誤的信號。alarm, danger, distress, warning報警/危險/求救/警告信號hand, non-verbal, smoke, visual手勢;非語言信號;煙霧信號;視覺信號turn (NAmE) (汽車上的)轉向指示燈busy (NAmE) (engaged tone in BrE) (電話佔線時的)忙音All I get is a busy signal when I dial his number.我給他撥電話只能聽到佔線的忙音信號。buy, sell (both business商業) 買入/賣出信號A strong buy signal was issued to traders.交易員收到了強烈的買入信號。VERB + SIGNALgive (sb), make, send, send out(給某人)發信號;打信號When I give the signal, run!我一發信號,你就跑!interpret, read解讀信號The brain interprets the signals from the retina as light.大腦把來自視網膜的信號解讀為光。interpret sth as把⋯理解為信號The remark was interpreted as a signal that their government was ready to return to the peace talks.該言論被視作政府準備重回和平談判的信號。pick up, respond to領會信號;對信號作出反應Interviewers quickly learn to pick up non-verbal signals.採訪者很快學會讀懂非語言信號。act as作為信號The insect's yellow spots act as a warning signal to its predators.昆蟲身上的黃點是向其天敵發出的警告信號。SIGNAL + VERBcome from sth信號來自⋯Try to read the signals coming from the patient.要盡量讀懂病人發出的信號。indicate sth信號表示⋯the signals that can indicate danger可能預示危險的信號PREPOSITIONat a signal, on a signal按照信號At a prearranged signal, everyone started cheering.看到預先約好的信號,大家都開始歡呼起來。signal for示意⋯的信號She made a signal for the car to stop.她打了個手勢,讓汽車停下了。signal from, signal to來自⋯的/給⋯的信號Wait for the signal from the leader of your group.等你們組的組長發出信號。
signal

noun²

2set of lights for drivers交通信號燈ADJECTIVE | VERB + SIGNAL | SIGNAL + VERB | SIGNAL + NOUN ADJECTIVErailroad, railway, traffic鐵路信號燈;交通信號燈VERB + SIGNALoperate操作信號燈SIGNAL + VERBbe on red/green, be red/green紅燈亮;綠燈亮The traffic signals were on red.交通信號亮着紅燈。fail信號燈失靈SIGNAL + NOUNbox (BrE) (鐵路上的)信號樓failure (BrE) 信號燈故障
signal

noun³

3series of radio waves, chemical messages, etc.無線電波;化學信息ADJECTIVE | VERB + SIGNAL | SIGNAL + VERB | SIGNAL + NOUN | PREPOSITION ADJECTIVEfaint, weak微弱的信號strong強信號high-frequency, low-frequency高頻/低頻信號input, output輸入/輸出信號acoustic, analogue/analog, audio, chemical, digital, electrical, electronic, GPS, light, radar, radio, satellite, sonar, sound, television, TV, video, wireless聲學信號;模擬信號;音頻信號;化學信號;數字信號;電信號;電子信號;全球定位系統信號;光信號;雷達信號;無線電信號;衞星信號;聲納信號;音頻信號;電視信號;視頻信號;無線信號VERB + SIGNALcarry, pass, relay傳送/傳遞/中繼轉發信號The nerves carry these signals to the brain.神經把這些信號傳給大腦。amplify, boost放大/增強信號convert (sth into), scramble(把⋯)轉換成信號;對信號作擾碼處理The signal is scrambled into code before it is sent.發送信號之前要先擾碼,把它變成密碼。decode, encode解碼信號;把信號編碼emit, generate, produce, send, transmit發射信號;發出信號;發送信號detect, pick up, receive, respond to探測信號;接收信號;對信號作出回應This equipment can detect very low-frequency signals.這種設備能夠探測甚低頻信號。block, jam攔截/干擾信號It is possible to jam GPS signals in battle.在作戰時對全球定位系統的信號進行干擾是可能的。SIGNAL + VERBtravel信號傳播The digital signal travels down wires to the server.數字信號沿着線路傳到服務器。A light signal can travel well over 16 km before it halves in intensity.光信號傳播 16 公里以上強度才會減半。fade信號漸弱SIGNAL + NOUNintensity, strength信號強度PREPOSITIONsignal from來自⋯的信號a faint signal from the satellite衞星發出的微弱信號signal to向⋯發出的信號
signal

verb¹

1move your arms to give a signal打手勢ADVERB | PREPOSITION ADVERBfrantically瘋狂打手勢I saw her signal frantically to us.我看見她瘋了似的朝我們打手勢。PREPOSITIONfor示意⋯He raised his hand to signal for the waiter.他舉起手向侍者示意。to向⋯打手勢She tried to signal to the bus driver to stop.她試圖打手勢讓公共汽車司機停車。
signal

verb²

2show/mark sth表明ADVERB | VERB + SIGNAL ADVERBclearly清楚地標誌These changes clearly signal the end of the welfare state as we know it.這些變化清楚地標誌着我們熟悉的福利國家的終結。effectively (especially BrE) 實際上表明A change of mind effectively signals a change in overall policy.改變主意實際上意味着整個政策有所改變。not necessarily不一定預示A fall in demand does not necessarily signal the death of the industry.需求的減少並不一定意味着該行業走向窮途末路。VERB + SIGNALappear to, seem to似乎/好像預示These events appeared to signal the end of an era.這些事件似乎預示着一個時代的結束。try to試圖表明be intended to, be meant to旨在/意欲表明This address was meant to signal a change in policy.這個講話意欲表明政策將有所改變。

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