| 词汇 | guard rail | 
| 释义 | guard rail  noun [ C ] uk/ˈɡɑːd ˌreɪl/ us/ˈɡɑːrd ˌreɪl/  护栏,扶栏 a bar along the edge of something steep, such as stairs or a cliff, to prevent people from falling off | 
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