Their instruments detected very faint radio waves at a frequency of 3 kilohertz.
他们的仪器探测到了频率为3千赫的非常微弱的无线电波。
Regular repeating actions such as sound waves, light waves, or radio waves have a certain frequency, or number of waves per second.
有规律的重复活动如声波、光波、无线电波都有一个特定的频率，或者说是每秒的波动次数。
If the radio waves are so good at getting through the universe, what's the problem?
如果无线电波真的能够穿透宇宙空间的话，它有什么问题呢？
They send out radio waves that reflect off raindrops, airplanes, bats, and so forth.
他们发射那些可以反射雨滴、飞机、蝙蝠以及其他东西的无线电波。
It is technically incorrect to talk about bat "radar", since they do not use radio waves.
蝙蝠“雷达”这个用语在技术上是错误的，因为它们不使用无线电波。
Marconi was the first to develop a practical method for wireless telegraphy using radio waves.
马可尼是第一个开发出利用无线电波进行无线电报传输的有效方法的人。
Radio wavelengths are much longer than those of visible light, and the radio waves from deep space are always weak.
无线电波的波长比可见光长得多，而且来自深空的无线电波总是很弱。
One problem is that radio waves from these far away objects, even though they can get through, are extremely faint.
一个问题是，来自这些遥远物体的无线电波，即使可以到达这里，也会非常微弱。
Nearly all astronomical objects in space emit radio waves, whether nearby stars, objects in far away galaxies, they all give off radio waves.
太空中几乎所有的天体都发射无线电波，无论是附近的恒星，还是遥远星系中的天体，它们都会发射无线电波。
To avoid interferences, and keep the telescopes sensitive, radio telescopes are built in places where there are no human radio waves or electronic signals.
为了避免干扰，保持望远镜的灵敏度，无线电望远镜被建在没有人为的无线电波或电子信号的地方。
Unlike visible light waves, these radio waves can get through the various gases and dusts in space, and through our own earth's atmosphere comparatively easily.
与可见光波不同的是，这些无线电波可以较容易地穿过太空中的各种气体和灰尘，穿过我们地球的大气层。
Some very important discoveries have been made by this technology, especially you consider that some objects in space give off radio waves but don't emit any light.
运用这项技术后，已取得了一些非常重要的发现，尤其是考虑到太空中的一些物体会发出无线电波，但不会发出任何光。
A receiver and amplifier receive the radio waves from the sub reflector, and make these weak radio waves strong enough to be recorded and turned into electronic signals.
接收器和放大器接收来自副反射器的无线电波，并使这些微弱的无线电波强大到足以被记录下来并转化成电子信号。
Most antennas are made in the shape of a dish to collect and reflect the radio waves to the sub reflector, in the same way as a curved mirror focuses visible light to one point.
大多数天线被制成碟形，用以收集和反射无线电波至亚反射器，就像曲面镜将可见光聚焦于一点一样。
The extension of astronomy from visible light to radio waves to x-rays and gamma rays never failed to lead to the discovery of unusual objects such as radio galaxies, quasars, and pulsars.
从可见光扩展到无线电波，再到X 射线和伽马射线，天文学总是会发现不寻常的物体，如射电星系、类星体和脉冲星。
We can detect radio waves on the basis of their affects.
我们可以根据它的影响，觉察到无线电波。
What is needed is a system that USES low-frequency radio waves.
这需要的是一种利用低频无线电波的系统。
Do the radio waves that cell phones emit pose a threat to health?
手机发出的无线电波是否真的对身体健康构成了威胁？
But combining radio waves also makes for less sharp, lower resolution images.
但混合无线电波也会降低图像的清晰度以及分辨率。
Light and radio waves are absorbed and scattered by interstellar gas and dust.
光波和无线电波能被星际气体和尘埃吸收及散射。
Ice, which is transparent to radio waves, also sends back left-polarized waves.
冰，对电磁波来说则是透明的，会把原来的左旋极化波反射回来。
So here's my proposal. Suppose what we think is not about harmony, but radio waves.
我的提议是这样的，假设我们想的不是和声而是无线电波。
The curved lines represent radio waves, a symbol of the broadcast nature of the RSS feed.
图标中的曲线代表无线电波，象征着rss提要的广播本质。
The planet became an intense emitter of radio waves (TV, cellphone, and radar transmissions.)
地球成了无线电波(电视、手机以及雷达传输器)的密集发射器。
Radar works by recording radio waves that have been reflected from the object under observation.
通常雷达通过从物体反射回的无线电波来确认位置。
Microwaves are a form of electromagnetic radiation that is very similar to sunlight and radio waves.
微波也是一种电磁辐射，这与阳光和无线电波都是非常相似的。
By now an idea obsessed him: that directed radio waves could be used to heat and destroy cancer cells.
一个念头一直缠绕在他的脑海里：导控无线电波也许可以用来加热并破坏癌细胞。
Mobile phones communicate by transmitting radio waves through a network of fixed antennas called base stations.
移动电话通信通过一个称为基站的固定天线网络发射无线电波。
Mobile phones communicate by transmitting radio waves through a network of fixed antennas called base stations.
移动电话通信通过一个称为基站的固定天线网络发射无线电波。
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