helmets FREQ #13787 n. 头盔( helmet的复数形式 ) 释义与例句 n. 1. plural of helmet 相关短语 pith helmets bicycle helmets safety helmets construction helmets crash helmets close helmets coal scuttle helmets steel pot helmets washbasin helmets purple helmets flying helmets Corinthian helmets kettle helmets space helmets beer helmets