热带雨林中居住的不那么鲜艳的鸟类和动物，往往依赖于视觉以外的信号形式，尤其是长距离的信号。
Less colorful birds and animals that inhabit the rain forest tend to rely on forms of signaling other than the visual, particularly over long distances.
在森林中，视觉信号只能在没有树木遮挡的地方在短距离内被看到。
In forests, visual signals can be seen only at short distances, where they are not obstructed by trees.
科学家说，接受到司机的脑电波信号能缩短刹车距离以避免撞车。
Tapping into drivers' brain signals can cut braking distances and avoid car crashes, according to scientists.
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。
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.
由于光速为人熟知，接收卫星信号时的任何时间迟缓都能折算出距离的远近。
Since the speed of light is well known, any delay in receiving the satellite's signal can be converted into a distance.
它与地球的距离如此之远，以致地球发出的无线电信号要以光速传播16个小时才能到达这部航天器。
It is so far from Earth that radio signals, traveling at the speed of light, take 16 hours to reach the spacecraft.
但是这种文化的更多的易得性(邮件和短信号码)，混乱性和束缚性，使得那些必要的界线和距离，变得更容易被侵蚀。
But with this culture of ever greater accessibility, ever greater involvement and engagement, it's far easier for those essential boundaries, that distance, to be eroded.
德国人没有出示秘密信号——他们近距离开了火，炸毁了悉尼号的舰桥，炸死了许多悉尼号高级军官。
The Germans had no secret signal – they fired at close range, wrecking the Sydney’s bridge and killing most of her senior officers.
然而，在空间站人员收到警报解除的信号之后，NASA发布了一份声明，称跟踪数据表明卫星碎片的距离不会接近到需要确保能进行空间站撤离的地步。
However, tracking data showed the debris would not come close enough to warrant an evacuation of the station, NASA said in a statement issued after the crew was given the all-clear signal.
按照信号传输距离粗略的划分，无线技术可以分为五类。
Wireless technology can be split into five main sorts, roughly ranked by the distance that the signals travel.
延迟时间会大于或等于电磁信号传输距离除以光速的比值。
The latency cannot be less than the distance the electromagnetic signal has to travel divided by the speed of light.
但是一项最新的研究通过解码人类对图像反应的神经信号，让这遥远的梦想的距离又拉近了一步。
Although the ability to play back memories like a movie remains a distant dream, a new study has taken a provocative step in that direction by decoding neural signals for images.
特别是如果电视机与天线距离超过超过20英寸(6米)，就得考虑买一个内置信号放大器的天线。
Think about buying an aerial with a built-in signal amplifier, especially if the television set is more than 20 feet (six metres) away.
但在Grex的系统内，水下机器人将充当一个中继站，将来自母船的控制信号传给连网的其他机器人，这种方式下的传输距离可达到数英里。
But in the Grex system, vehicles will be able to act as relay stations, bouncing a control signal from the mother ship to the networked submarines over many miles.
蓝牙要求电池有足够强的电力，可以在一到十米左右的距离内发送无线信号。
Bluetooth requires batteries powerful enough to send radio signals between roughly one and 10 meters.
问题：Wi - Fi使用了传送信号距离不超过几十米的频率。
PROBLEM: Wi-Fi USES frequencies that can't carry a signal more than a few tens of meters.
他们在8个的大型椭圆星系中发现了红矮星发出的微弱信号，这些星系离我们相对较近——它们的距离都在5千万到3亿光年之间。
They found faint signatures of these red dwarf stars in eight massive elliptical galaxies relatively close to us—between 50 million and 300 million light-years away.
你的驾驶变得草率(尾随前车距离太近，迂回前行，错过红绿灯信号)。
Your driving becomes sloppy (tailgating, weaving, missing traffic signals).
既然在可用带宽数量与信号能够传播的距离之间存在固有的平衡，那么，可用带宽越多，信号就能够传播得更远。
Since there is an inherent trade-off between the amount of available bandwidth and the distance that a signal can travel, the more bandwidth is available, the farther a signal can travel.
原则上，由量子微粒引起的微小弯曲效应应该通过长距离的累积形成一个可探测的信号。
In principle, the tiny twisting effect due to the quantum grains should have accumulated over the very large distance into a detectable signal.
卡西尼号远离土星环而观察到的每个信号的变化提供了一份环材料分布的侧写。这是一个距土星距离的函数，或是一个光学深度剖面。
The observed changeof each signal as Cassini moved behind the rings provided a profile ofthe distribution of ring material as a function of distance fromSaturn, or an optical depth profile.
由于光速广为人知，接受卫星信号时的任何时间迟缓都能折算出距离的远近。
Since the speed of light is well known, any delay in receiving the satellite's signal can be converted into a distance.
由于光速广为人知，接受卫星信号时的任何时间迟缓都能折算出距离的远近。
Since the speed of light is well known, any delay in receiving the satellite`s signal can be converted into a distance.
即使在非常小的线间距的情况下，在大于信号上升的距离5到6倍的距离以上串扰才会成为电路设计的一个问题。
Even with very tight conductor-to-conductor spacing, parallel runs of 5 to 6 times signal rise distance are required before crosstalk becomes a problem.
制造方面的突破随后为更远距离的光纤信号传输铺平了道路。
Manufacturing breakthroughs then opened the way for moving signals over far greater distances.
连接到信号灯的路边标识能在距离路口数百米处帮忙提供信息，但是这样的标识除了价格高昂之外，也未被广泛部署。
Roadside signs wired to traffic lights can help get the message across a couple hundred metres from a junction, but such signs are expensive, and have not been widely deployed.
辐射的放射水平还取决于手机类型、与最近的手机信号发射塔的距离以及同一区域内使用手机的人数。
Radiation levels also change depending on the phone type, the distance to the nearest cell phone tower and the number of people using phones in the same area.
这不是一件小事；短距离无线保真频率是无牌普，曾经被认为是“垃圾频率”，短距离无线通讯充满了从微波炉和婴儿监视器里收集到杂乱的低强度信号。
This is no small thing; the standard for Wi-Fi was developed on unlicensed spectrum that had been considered "junk band", cluttered with low-intensity signals from microwave ovens and baby monitors.
这不是一件小事；短距离无线保真频率是无牌普，曾经被认为是“垃圾频率”，短距离无线通讯充满了从微波炉和婴儿监视器里收集到杂乱的低强度信号。
This is no small thing; the standard for Wi-Fi was developed on unlicensed spectrum that had been considered "junk band", cluttered with low-intensity signals from microwave ovens and baby monitors.
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