hard hat 的英语意思
hard hatˌhard ˈhat noun [countable] 
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a protective hat, worn especially by workers in places where buildings are being built安全帽，尤指建筑工地工人所戴的防护帽
查看全部语言翻译 a protective hat, worn especially by workers in places where buildings are being built安全帽，尤指建筑工地工人所戴的防护帽