observated造句

• Ionospheric scintillation can be observated frequently in low-latitude of china, so it is very important to know the physical mechanism of night-time f region plasma instability and irregularities in it
  我国的低纬地区属于电离层闪烁频繁发生的区域,研究电离层f区中不规则结构的产生、演化、形态及分布规律、对电波的影响等具有很重要的意义。