lifeguards什么意思？

lifeguards的音标：...

Children swim at the pool, under the watchful eye of lifeguards.孩子们在救生员的监护下在水池里游泳。The lifeguards must be trained to deal with any sort of emergency.救生员一定要接受训练,学会应付各种紧急情况.Most of the cases occur at beaches without lifegua...