劍橋詞典a large boat that is kept ready to go out and save people who are in danger in the water （用於救援生命有危險(xiǎn)的人的）救生船，救生筏 a small boat kept on a ship for people to leave in if the ship is not safe or might sink （配在船上供逃生用的）救生船，救生筏 返回 lifeboat