lifeboat /ˈlaɪfˌbəʊt/

• 1. 

  N-COUNT 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. 救生船

• 2. 

  N-COUNT 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. 救生艇

  例：

  The captain ordered all passengers and crew into lifeboats.

  船长命令所有的乘客和船员上救生艇。