single fluke anchor

例句：

1. 1. The boat was anchored securely in the harbor.
   这艘船被安全地锚在港口。
2. 2. The captain decided to use a single fluke anchor for safety reasons.
   船长决定为了安全原因使用单桅锚。
3. 3. The crew worked diligently to secure the single fluke anchor.
   船员们努力工作，确保单桅锚固定牢靠。