It was not, however, till the invention of telegraphs that anything approaching to the means of holding regular communication by signals was attained. 弗雷德里克·科利尔·贝克维尔.伟大的事实.
By means of signals they could be informed where to direct their shots. 尤利西斯·格兰特.U．S．格兰特的个人回忆录.
The signals of his telegraph consisted of the bubbles of gas arising from the decomposition of water, during the action of the electric current. 弗雷德里克·科利尔·贝克维尔.伟大的事实.
Those are signals--it is their way--the attack must be near. 夏洛蒂·勃朗特.雪莉.
The day before the convention met Morse had arranged with Vail that certain signals should mean that certain candidates had been nominated. 鲁伯特·萨金特·荷兰.历史性发明.
As this causes a loud repetition of the original signals, it will be seen that relaying is an economic method of extending a telegraph circuit beyond the natural limits of its battery power. 弗兰克·刘易斯·戴尔.爱迪生的生平和发明.
The drill of the student involved chiefly the acquisition of the special signals employed in railway work, including the numerals and abbreviations applied to save time. 弗兰克·刘易斯·戴尔.爱迪生的生平和发明.
This device being a relay, its purpose is to repeat transmitted signals into a local circuit, as before explained. 弗兰克·刘易斯·戴尔.爱迪生的生平和发明.
Who else rustles about it, making signals by dropping dust so softly? 查尔斯·狄更斯.小杜丽.
He replaced the recording pencil with a fountain pen, and instead of the zigzag signals used the short and long lines that came to be called dots and dashes. 鲁伯特·萨金特·荷兰.历史性发明.
He made all manner of gestures while he spoke, as if in incidental imitation of some few of the great diversity of signals that he had never seen. 查尔斯·狄更斯.双城记.
This was in reality the first example of railroad trains moved by telegraph signals, a practice now so common and universal as to attract no comment. 弗兰克·刘易斯·戴尔.爱迪生的生平和发明.
Possibly, if he had observed the brief interchange of signals, he might have thought that it boded no good to him. 查尔斯·狄更斯.雾都孤儿.
They would also take off the signals of the enemy and transmit them. 尤利西斯·格兰特.U．S．格兰特的个人回忆录.
Wireless signals are in reality wave motions in the magnetic forces of the earth, or, in other words, disturbances of those forces. 鲁伯特·萨金特·荷兰.历史性发明.
If this disk was removed from the machine and put on a similar machine provided with a contact point, the embossed record would cause the signals to be repeated into another wire. 弗兰克·刘易斯·戴尔.爱迪生的生平和发明.
The ordinary speed of telegraphic signals is thirty-five to forty words a minute; but with this machine several hundred words were possible. 弗兰克·刘易斯·戴尔.爱迪生的生平和发明.
In this way a rapid succession of signals can be sent. 佚名.神奇的知识之书.
The first method that suggested itself was to transmit signals by means of pith-ball electrometers. 弗雷德里克·科利尔·贝克维尔.伟大的事实.
There was a colored man in the fort who had been there before and who understood these signals. 尤利西斯·格兰特.U．S．格兰特的个人回忆录.
For the action of this very efficient telegraph only five wires were required, and the signals being all primary ones, the messages might have been transmitted very quickly. 弗雷德里克·科利尔·贝克维尔.伟大的事实.
The dynamo was driven by the wave or tide motion through intermediate mechanism, and thus the lamps were lit up from time to time, serving as signals. 弗兰克·刘易斯·戴尔.爱迪生的生平和发明.
Within the space of three minutes similar signals boomed in the east and west. 夏洛蒂·勃朗特.雪莉.
There are a great many different kinds of signals for the guidance of vessels during fogs, when lights or other visible signals cannot be perceived. 佚名.神奇的知识之书.
Marconi of Italy has been more successful in this direction, and has sent electric messages and signals from high stations over the English Channel from the shores of France to England. 威廉·亨利·杜利特.世纪发明.
Signals for the day and signals for the night gave constant and timely notice of the position of switches. 马克·吐温.傻子出国记.
It is well known that one operator can recognize another by the way in which he makes his signals--it is his style of handwriting. 弗兰克·刘易斯·戴尔.爱迪生的生平和发明.
Cooke and Wheatstone so far simplified the arrangements of their needle telegraph as to make all the requisite signals with two needles. 弗雷德里克·科利尔·贝克维尔.伟大的事实.
The extension of these arms on one side or the other, either separately or together, and at different angles, constituted a variety of signals sufficient for the purposes of communication. 弗雷德里克·科利尔·贝克维尔.伟大的事实.
Then there was a cessation of all signals; then I made out the words 'Minor Botts. 弗兰克·刘易斯·戴尔.爱迪生的生平和发明.