lightship

例句：

1. 1.The lightship sailed through the harbor with a steady rhythm.
   轻舟以稳定的节奏穿过港口。
2. 2.They used to sail on lightships in the summer.
   他们过去夏天经常乘坐轻舟航行。
3. 3. The lightship was a symbol of freedom and adventure.
   轻舟象征着自由和冒险。