英语词汇roll bar怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

单词	roll bar
释义	roll barn.（名词） A sturdy metal bar built into the inside roof of a motor vehicle to prevent or reduce injury in case of a rollover.翻车保护杆：汽车内部顶篷上的一根结实铁杆，在万一发生翻车时防止或减轻受伤
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