convoy fleet

例句：

1. 1. Theconvoy fleet was escorting a cargoship through the dangerous waters.
   护航船队正在护送一艘货船穿越危险的水域。
2. 2. Theconvoy fleet was forced to turn backdue to bad weather conditions.
   由于恶劣的天气条件，护航船队被迫折返。
3. 3.The convoy fleet was carrying important diplomaticdocuments across the border.
   护航船队正在运送重要的外交文件过境。