fore-reef facies

例句：

1. 1.The fore-reef facies is a unique feature of the coral reef system.
   前礁相是珊瑚礁系统的一个独特特征。
2. 2. The fore-reef facies plays a crucial role in the formation and evolution of coral reefs.
   前礁相在珊瑚礁的形成和演变中起着至关重要的作用。
3. 3. The fore-reef facies is often used as an indicator of the health of a coral reef ecosystem.
   前礁相常被用作指示珊瑚礁生态系统健康状况的指标。