单词lightship
n.: （海上导航用的）灯船网络: 灯塔船；灯标船；石油英语词汇
（海上导航用的）灯船:
a small ship that stays at a particular place at sea and that has a powerful light on it to warn and guide other ships
灯船,灯塔船
航路标志灯
复数：lightships