作用: act on; affect密度: density; thickness可用密度: usable density使用密度: densities of use作用密集: kicca ghana土地利用密度: land use inte ity; land use intensity; landuseinte ity土地使用密度: density, land use有用密度范围: useful density range分程序块引用密度: block reference density指低于可用密度的潜像: sub-image密度分层作用: density stratification密度制约调节作用: density dependent regulation用密码: in cipher代用密码: substitution cipher公用密码术: public key cryptography公用密钥: common key; pk public key; public key公用密钥制: public key system门用密封条: door seal strip耐用密封的: sealed for life实用密技: psp私用密钥: private key通用密码机: general purpose cipher set用密码书写: cypher用密码写的: cryptographic轴用密封件: runddichtringo; wellendichtring