The signals carried in copper wires consist of about one million waves per second . 在铜线中传送的信号是由大约每秒100万次波的电磁波所组成。
The signal is fed into a filter-amplifier which is transformer-coupled to the video-detector . 这个信号送到滤波器-放大器，它是由变压器耦合到视频检波器的。
An electron beam, forming a scanning spot on the signal plate, zigzags its way, line by line, across the plate . 在信号板上形成扫描点的电子束，逐条地曲折扫过信号板。
The signal collecting area of each system would be at least 100 times greater than that of the arecibo telescope . 每个系统的收集信号的区域至少一百倍于阿雷西博望远镜。
Generally the components of the signal that are in phase and out of phase with the primary signal are plotted separately . 一般都分别划出与原始信号同相和异相的信号分量。
It was the vane on the roof turning round and this change in the wind was the signal for a disastrous rain . 这是房顶上的风标在转动，风向的这种变化，就是一场特大暴雨的信号。
A pair of drums is used, and the signals are transformed successively from one to the other as the summation proceeds . 采用双鼓，信号不断从一个鼓传递到另一个鼓就如相加的过程。
The bishop's letter was the signal for a campaign of vilification and intimidation unequaled in american history . 主教的信是发动一场在美国历史上没有前例的诬蔑和恐吓运动的信号。
Therefore we must listen long enough to detect a strong, easily distinguishable part of the signal . 因此，我们必须倾听足够长的时间，以便探测该信号的强有力的、易于分辨的那一部分。
The signal thus received will no longer look like a square wave but will be distorted in shape and spread out in time . 这样收到的信号看起来不再象矩形波，而是受到畸变，并且持续时间延长了。
