echovi.发出回声；回响vt.重复；模仿；附和n.回声；重复；共鸣Echo.n.[希神]山林女神（失恋于那喀索斯；其哀声留于山间成为回声）echosoundadj.音响测深的(回声探测的)

1. The echo of wind profiler radar is always disturbed by colored noise.
   摘要实际操作中发现，风廓线雷达回波常受到色噪声的干扰。
2. Then the radar echo models and their realization methods were studied, especially on radar targets and land clutter.
   然后分析了雷达回波信号模型，重点讨论了雷达目标和地杂波的信号模型及产生方法。