地波 (de) — ground wave (radio wave that travels along the Earth's surface, used in AM radio and maritime communication)

Définition

Exemples

• 地波传播距离短，但信号稳定。
  de Chuán bō jù lí duǎn, dàn xìn hào wěn dìng.
  Ground waves have a short propagation distance, but the signal is stable.
• 无线电通信中，地波和天波的应用范围不同。
  Wú xiàn diàn tōng xìn zhōng, de hé tiān bō de yìng yòng fàn wéi bù tóng.
  In radio communication, ground waves and sky waves have different application ranges.
• 科学家研究了地波在不同地形下的传播特性。
  Kē xué jiā yán jiū le de zài bù tóng dì xíng xià de chuán bō tè xìng.
  Scientists studied the propagation characteristics of ground waves over different terrains.