semi-diurnal tide

例句：

1. 1. The semi-diurnal tide is a phenomenon where the water level rises and falls in a predictable pattern during the day.
   半日潮汐是一种现象，在白天水位会有规律地上升和下降。
2. 2. This region experiences semi-diurnal tides twice a day, which can cause significant floodingduring high tide.
   这个地区每天两次经历半日潮汐，这可能导致高潮时严重的洪水。
3. 3. The study of semi-diurnal tides is crucial for understanding the movement of ocean currents and the behavior of marine life.
   研究半日潮汐对于理解海洋流动和海洋生物的行为至关重要。