n.救生圈，(使人不下沉的)救生带

原形：lifebelt复数：lifebelts

The lifebelt was thrown to the drowning man by the lifeguard.
救生员将救生圈扔给了溺水的人。
Make sure to keep the lifebelt within easy reach in case of emergency.
确保在紧急情况下能轻易拿到救生圈。
The lifebelt was the only thing that saved him from drowning.
救生圈是他避免溺水的唯一救命稻草。
The captain ordered all passengers to put on their lifebelts before the ship sank.
船长命令所有乘客在船沉没前穿上救生衣。
The lifebelt was made of high-quality materials to ensure its buoyancy.
救生圈是由高质量材料制成，以确保其浮力。
The lifebelt had a whistle attached to it for signaling for help.
救生圈上有一个哨子，用于发出求救信号。
The lifebelt was designed with a grab handle for easy handling.
救生圈设计有抓握把手，便于操作。
The lifebelt was found floating in the water, but the person it was meant for was nowhere to be seen.
发现救生圈漂浮在水上，但原定的使用者却不见踪影。
The lifebelt was tested to withstand harsh weather conditions.
救生圈经过测试，能够承受恶劣天气条件。
The lifebelt was equipped with a reflective strip for visibility at night.
救生圈配备有反光条，在夜间提高可见度。