rigid classification严密: tight; close; tidy; narrow的: 4次方是 The fourth power of 2 i ...保密: keep a secret density制度: system; institution严格: strict; rigorous; rigid; str ...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:严密的保密制度, 严格的密级,即可在微信中查询翻译