lifeguard
🇺🇸
/ˈlaɪfɡɑːrd/
🇬🇧
/ˈlaɪfɡɑːd/
A person who watches over a beach or pool to help people in danger in the water.
The lifeguard at the pool quickly jumped in to rescue the struggling swimmer.
游泳池的救生員迅速跳入水中,营救掙扎的游泳者。