名词
中文翻译：Unknown
同义词：
['protective rail', 'safety rail', 'guardrail']
例句：
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1. The guard rails are designed to prevent people from falling off the edge of the bridge.
护栏的设计是为了防止人们从桥边掉落。
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2. The guard rail is made of steel and is installed at regular intervals along the road.
护栏由钢制成，沿着道路每隔一定距离安装。
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3. The guard rail is a crucial safety measure for pedestrians crossing the street.
护栏是行人过马路时的重要安全措施。