49.the surface of display sweep coil contaminated by dust. The echo sighals in some sectors missing on the screen.

由于扫描线图表面不清洁，荧屏上回波信号部分区域丢失。

57.there is no echo signal. But brightness, scanning line are still exists.

没有回波，但亮度，扫描均正常。

58.there is no echo and brightness, it is examined that fuse has broken.

雷达无亮度，无回波。经查保险丝烧断。

One theory is that this is caused by a quasar ionization echo.

一种理论认这是由类星体电离回波引起的。

Mansfield used echoplanar imaging in his prototype scanner, which went into experimental use in 1978.

曼斯菲尔德在他的原型扫描仪中使用了回波平面成像技术，该技术于1978年进入实验使用阶段。

799. Our radar shows a strong echo from the thunderstorm ahead.

799. 我们的雷达前方雷暴的强烈回波。

There's a radar return about a mile-and-a-half below the surface of the south pole ice that is clear-cut signs of liquid water.

在南极冰面下方约一英里半出现雷达回波，这是明确的液态水迹象。

64.the mixer crystal is outdated , the echo signals are not clear. For bigger range scales , small targets are always missing.

混频晶体老化，回波不清楚，大海里档小物标常丢失。

Meteorologists often refer to it as the hook echo, because of the hook shape that ends up taking.

气象学家通常将其称回波，因它最终呈。

Meteorologists often refer to it as the hook echo, because of the hook shape that it ends up taking.

气象学家通常将其称回波，因它最终呈现出。

It could send out radio signals and measure the returning echoes from nearby objects in space, including planets and asteroids.

它可以发射无线电信号并测量来自附近天体（包括行星和小行星）的回波。

I am adapting the same models that detect plumes in city images to detect light echoes in images of the sky.

我正在调整检测城市图像中羽流的相同模型，以检测天空图像中的光回波。

An antenna onboard the satellite emits microwave pulses to the surface of the earth and records the echoes that bounce back.

卫星上的天线向地球表面发射微波脉冲，并记录反射回来的回波。

50.the echo signals are very weak, small targets can not be sighted. it is possible to say that magnetron is out of service

回波信号太弱，小目标看不到，可能是由于磁管老化。

Part of the pulse is reflected back at the event and the observer measures the time at which he receives the echo.

部分脉冲在事件中被反射回来，观察者测量他接收到回波的时间。

To get a complete picture, waves need to reach different depths in the patient's body, bypassing some tissues while echoing off others.

了获得完整的图像，波需要到达患者身体的不同深度，绕过一些组织，同时回波其他组织。

Meteorologists often refer to it as the hook echo because of the hook shape that it ends up taking but there aren`t the only features we look for.

气象学家经常把它称回波，因它最终呈现的是回波，但并不是我们要寻找的唯一特征。

48.the waveguide assembly was full water . the radar can not transmit and receive normally . there is a cluster of echoes in the centre of radar screen.

波导管进水，雷达不能正常发射与接收，雷达屏幕中间部位有一团回波。

66.the echo signals are weak , the edges of the signals are unclear as well , the current of the magnetron is a little bit less than normal

回波弱，边缘也不清晰，磁控管电流略小于正常值。

Instead of building an extremely large antenna to capture returning waves, these satellites combine signals from a relatively small antenna moving through space to sharpen resolution.

这些卫星并非通过构建一个极其庞大的天线来捕捉回波，而是将相对较小天线在太空中移动时所接收到的信号进行合成，从而提升分辨率。