1.内河运货船
1.a covered riverboat with a keel and shallow draft but no sail, propelled by rowing, poling, or towing, and used for transporting freight
1.This two-person keelboat is known for its relative small cockpit and its flexible mast.
这艘双人龙骨船的特点在于它相对较小的船舱和灵活的桅杆。