security基本解释
n,[安全]安全；保证；证券；抵押品
security相关例句和用法The trial was held under tight security ..这场审讯是在戒备森严的情况下进行的。
security英英释义安全，安保nn
security短语social security社会保险，社会保障
security 真题例题真题例句...letting go of the safety and security of the past gives us great fear
