According to the echo area and intensity change of target cloud, the qualitative judgment that the artificial rainfall is effective or not can be gotten.

根据作业云回波面积和强度的变化，可定性判断人工增雨是否有效。

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Acoustic processing and echo control Sound pickup and playback is an important area of multimedia processing.

声学处理和回声控制拾音和重放是多媒体处理的一个重要领域。

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Methods in the computer simulation of the ultrasound color flow imaging, flow signals are obtained by accumulating all the echo signals of scatterers in the imaging area.

方法超声彩色血流成像计算机仿真中，血流信号是对成像区间内所有点散射体的回波信号累加而得到的。

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The Express and Echo, which is circulated in the Exeter area, said the move was in response to falling circulation and market changes.

BBC: Express and Echo

Echo, a condominium in the Miami-area that recently hit the market, will have some 2, 800-square-foot units with 300-square-foot master closets, more than 10% of the total floor plan.

WSJ: The $100,000 Closet