signal
['sɪg.nəl] noun countable
ACTION 行动
IMPROVER
■an action, movement or sound which 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。 •[+ that] The firework was a signal that the festival had started.烟火是节日已经开始的信号。 •[+ to infinitive] The police officer gave us a signal to stop.员警示意我们停下。 •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 for * indicator
['sɪg.nəl] noun countable
WAVE 波
ADVANCED
■a series of electrical or radio waves which are sent to a radio or television in order to produce a sound, picture or message （用于传输声音、图像或其他资讯的）电波信号
['sɪg.nəl] noun countable
SHOWING 表现
■something which shows that something else exists or is likely to happen 迹象•The poor result is a clear signal of his deteriorating confidence.糟糕的结果清楚地显示他信心日渐不足。 •The changing colour of the leaves on the trees is a signal that it will soon be autumn.树叶颜色的改变代表秋天即将来临。
['sɪg.nəl] noun countable
EQUIPMENT 设备
■equipment, especially on the side of a railway or road, often with lights, which tells drivers whether they can go, must stop or should move more slowly （尤指铁路或公路上的）号志灯•a railway signal铁路号志灯 •a traffic signal交通号志灯 •a road signal道路号志灯
['sɪg.nəl] verb (-ll- or US USUALLY -l-)
ACTION 行动
IMPROVER intransitive or transitive
■to make a movement, sound, flash, etc. which gives information or tells people what to do 发信号；示意•Flashing lights on a parked car usually signal a warning (to other motorists).停着的车辆上闪烁的车灯通常是警告（其他驾车者）的信号。 •He signalled left, and turned the lorry slowly.他打开左转方向灯，然后将卡车缓慢转弯。 •He was signalling (= giving a signal) with a red flag.他正用红色旗子发信号。 •She signalled for help.她发出了求救信号。 •[+ that] She signalled to the cars behind that they were going the wrong way.她示意后面的车辆走错了路。 •[+ obj + to infinitive] The children's mother signalled them to be quiet.孩子们的母亲示意他们安静。 •[+ to infinitive] The children's mother signalled to/for them to be quiet.孩子们的母亲向他们示意保持安静。
['sɪg.nəl] verb (-ll- or US USUALLY -l-)
SHOW 表现
transitive
■to show that you intend or are ready to do something 表达，表示；显示•[+ that] The union has signalled that the workers will strike.工会表示工人们将会罢工。 •The union has signalled the workers' intention to strike.工会已表示工人们打算罢工。 •The death of Chairman Mao signalled (= marked) the end of an era in Chinese history.毛主席的去世标记着中国历史上一个时代的结束。
['sɪg.nəl] adjective [before noun] formal
■noticeable; not ordinary 显著的；不寻常的•a signal success/failure重大胜利／失败 |