The simple detection of a radio signal will be sufficient to answer this most basic of all questions.
对无线电信号的简单探测就足以回答这个最基本的问题。
A radio signal is processed to generate 1-bit signal values.
处理无线电信号以生成1位信号值。
As a satellite passes overhead, it sends out a radio signal that can be detected by a receiver in a car's computer.
卫星从高空经过时发出能被汽车上计算机里的接收器辨认的无线电信号。
NASA and SETI astronomers picked up on a radio signal that seemed to have a coded message sometime in the mid 1980's.
美国宇航局和SETI天文学家拿起一个无线电信号，似乎有一个编码信息的某个时候在80年代中期。
At the worst, these will amount to twenty hours-the time it takes a radio signal to span the orbit of Pluto, the outer-most planet.
最糟糕的情况也就是20小时，即无线电信号越过最远的冥王星的轨迹的时间。
When exposed to a radio signal, they use its energy to send back the information they contain, mostly a long number identifying an object.
当这些标签暴露在无线电信号下时，它们将利用信号的能量发回其所包含的信息，这些信息大部分是用于识别物品的一长串数字。
The jamming technology works by sending out a radio signal so powerful that phones are overwhelmed and cannot communicate with cell towers.
干扰技术就是能够发出无线信号，干扰与信号塔的联络。
Their device broadcasts a radio signal through a building and, when that signal comes out the other side, monitors variations in its strength.
他们的设备传播一种穿越房屋的无线电信号,当信号从另一断出来时,监测其强度变量.
It takes around 2.5 seconds for a radio signal to reach the Moon and bounce back to another part of the Earth, so it took around five seconds to get a reply.
一道无线电讯号得花大约2.5秒传到月球，然后再回传到地球另一端，所以要收到回应大约要花5秒。
The beam is wide enough at that distance to hit a lot of stars, and still be strong enough for someone to notice. But I can't send a radio signal through the ground.
如果能做到，我会对准最近的星系，在这样遥远的距离上，波束会发散的足够广阔，会覆盖到许多星星。
When a radio signal (an electromagnetic wave) propagates into the ionosphere, it might be absorbed, attenuated, refracted, or it might shoot right through and out into space.
当一个无线电信号(电磁波)传播进入电离层时，它也许会被吸收、削弱、折射，或者会穿透并进入太空。
The car is fitted with a remote immobilizer and a radio signal from a control center miles away will ensure that once the thief switches the engine off, he will not be able to start it again.
车上已经被装了远程制动装置，一个几英里以外的控制中心发来的无线信号将确保盗贼一旦启动引擎，他就不能再次发动汽车了。
If a special tag-reader is waved near the arm, a radio signal prompts the chip to transmit an identification number which is used to call up information about the wearer in a computer database.
当专用标记阅读器在手臂附近晃动，无线电信号就会激活微芯片传送识别码，从而调出电脑数据库中该客户信息。
The car is fitted with a remote immobiliser, and a radio signal from a control centre miles away will ensure that once the thief switches the engine off, he will not be able to start it again.
车上安装了远程锁止器，几英里以外的控制中心发来的无线信号将会使偷车贼一旦将车熄了火，就再也无法发动引擎。
A spaceship's position can be located by following its radio signal, or by using telescopes and radar.
宇宙飞船的位置可以根据追踪它的无线电信号来确定，也可以用望远镜和雷达来确定。
If, on the other hand, an alien radio signal were to be detected, that would constitute a more clear-cut and exciting moment.
另一方面，如果一地外的无线电信号能被探测到，那就将会是一个更为清晰且令人兴奋的时刻。
In an upcoming issue of Geophysical Research Letters, a team reports that the variations in radio signal coincide with the intensity of the planet's auroras.
在即将出版的《地球物理学研究快报》上，一个研究小组报道说，无线电信号的变化跟土星极光的强度正好一致。
You should be thinking of the distribution for web content more as a signal for a radio show.
你更应该认为网络内容的分发是广播节目中的信号。
The bright colors on the blue background indicate that an anomalous signal was received here on Earth by a radio telescope involved in a Search for Extraterrestrial Intelligence (SETI).
在蓝色背景上的明亮颜色表明在地球上收到了一个不寻常的信号，它来自于搜寻地外文明计划（SETI）的一台射电望远镜。
Until now, the volume of a transmitted radio message overpowered the relatively weak incoming signal from the radio at the other end.
直到目前为止，一个无线电节点发送的无线电信息音量往往相对较强，总会盖过另一端无线电发送进来的相对较弱的信号。
In this sense threshold means a sort of transition point like the threshold when an FM radio signal breaks through from being just static to being music (or maybe an AD).
从这个意义上讲，“threshold”意味着一种临界点，就像一个开关，使得FM无线电信号从静止状态到播放音乐状态(或者，也可能是一个广告)的忽然变化。
It involves pointing a radio receiver at a candidate star (one that is sunlike and not too far away) and listening for some sort of steady signal - an alien radio broadcast, on all the time.
它涉及到指出电台接收器在候选星体(像太阳一样的星体)，监听各种稳定的信号，外星人广播，全时段的。
One reason this is hard is that radio telescopes must chop the spectrum into fine portions to study it, like tuning into a signal on a car radio.
研究工作进展困难的一个原因是，正如汽车收音机的调频一般，射电望远镜必须把光谱按照波段分成易于研究的片段。
Ambient radio waves have largely been ignored as a potential power source until recently, because the power of a broadcast radio signal rapidly decreases with distance.
直到最近环境无线电波才格外受到重视成为一种潜在的电源，这是因为广播电台的无线电信号发电随着距离的增加而锐减。
A few hundred yards farther on, White used his radio to signal the other cars to pull over.
我们又往前开了几百米，怀特用自己的对讲机发信号示意其他车都停到路边去。
An intricate set of metal layers focuses and manipulates incoming radio waves, allowing the tag to send back a clear signal.
这套装置以一系列精巧的金属片来聚焦和操控入射的无限电波，使标签将清晰的信号反射回来。
When it receives the right radio signal, from, say, a mobile-phone network, aircraft or satellite, the device may blow up, shut down, or work differently.
当它从手机网络、飞机或卫星接收到恰当信号时就会爆炸、关闭或是改变运作方式。
A more efficient approach for live TV is to “multi-cast” a signal to all handsets using a separate radio network overlaid on the existing mobile network.
更有效的一种方法是让电视直播通过运用分散的网络辐射装置发出讯号，覆盖所有可用的移动网络，从而尽可能大范围地向所有掌上设备散播无线信号。
A more efficient approach for live TV is to “multi-cast” a signal to all handsets using a separate radio network overlaid on the existing mobile network.
更有效的一种方法是让电视直播通过运用分散的网络辐射装置发出讯号，覆盖所有可用的移动网络，从而尽可能大范围地向所有掌上设备散播无线信号。
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