closed cipher system封闭: seal off; seal的: 4次方是 The fourth power of 2 i ...密码: cipher; cypher; cryptogram; ...体制: system of organization; setu ...密码体制: cipher system下载手机词典可随时随地查词查翻译关注微信公众号：chachacidian，回复:封闭的密码体制，即可在微信中查询翻译
