tidal signal

例句：

1. 1. The tidal signal is a crucial indicator of the ocean's currents.
   潮汐信号是海洋潮流的重要指示器。
2. 2. The scientists used the tidal signal to track the ship's position.
   科学家们利用潮汐信号来追踪船只的位置。
3. 3. The tidal signal was so strong that it could be heard from the shore.
   潮汐信号非常强烈，可以从岸边听到。