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。经险丝烧断。

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

由于显示器扫描线图表面不清洁，荧屏上回波信号部分区域丢失。

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。

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

799. 我们的雷达显示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.

南极冰面下方约一英里半雷达回波，这是明确的液态水迹象。

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钩状回波，因它最终钩状。

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钩状回波，因它最终钩状。

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。

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弹回来的回波。

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。

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钩状回波，因它最终的是钩状回波，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。

Well, if Burke isn't coming, then we have to confirm Denny's condition ourselves. we get the blood work, we do the echo, and no one even has to know what Izzie did.

如果 Burke 不能来的话，我们必须自己来确认 Denny 的情况，我们要让血液流通，做回波检，而且没人需要知道是 Izzie 干的。