| 单词 | guardrail | 
| 释义 | guardrail  (gɑːʳdreɪl  ) also guard rail Word forms:  guardrails   countable noun A guardrail is a railing that is placed along the edge of something such as a staircase, path, or boat, so that people can hold onto it or so that they do not fall over the edge.   He called police to say he had struck a guardrail in a parking lot. | 
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