名词
中文翻译：生命守护者
同义词：
['lifeguard', 'guardian of life']
例句：
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1.The lifeguards were busy keeping an eye on the crowd.
值勤的保安们忙着看护人群。
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2.The lifeguards were responsible for ensuring the safety of the swimmers.
这些保安负责确保游泳者的人身安全。
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3.During a power outage, the lifeguards were called upon to help those in need.
在停电期间，保安被召唤来帮助那些有需要的人。