lifeguards的例句（lifeguards在句子中的用法）

• Most of the cases occur at beaches without lifeguards. 其中大部分都是发生在无人看守的海边.
• 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.
• 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。