beach retrogression

例句：

1. 1. The beach has been experiencing a significant retrogression in sand levels over the past fewyears.
   过去几年里，海滩的沙层水平出现了显著的后退现象。
2. 2. This study aims to investigate the beach retrogression phenomenon and its impact on coastal ecosystems.
   这项研究旨在调查海滩后退现象及其对沿海生态系统的影响。
3. 3. The scientists observed that the beach was retreating due to climate change, which could have serious consequences for thelocal wildlife.
   科学家们观察到由于气候变化，海滩正在后退，这对当地野生动物可能产生严重后果。