名词

1. （派往海上救助的）救生船
A lifeboat is a medium-sized boat that is sent out from a port or harbour in order to rescue people who are in danger at sea.

2. （船上备用的）救生艇
A lifeboat is a small boat that is carried on a ship, which people on the ship use to escape when the ship is in danger of sinking.

1. a strong sea boat designed to rescue people from a sinking ship