20秒记一个单词第731个security/sɪ'kjʊərətɪ/n.保护措施;安全工作:击收听音频跟读↓↓↓↓↓↓↓↓↓例句/词组:Theycarriedoutsecuritychecksattheairport.他们在机。
英语解释:They carried out security checks at the airport.
他们在机场实行了安全检查。
the activities involved in protecting a country, building or person against attack, danger, etc. 保护措施;安全工作: