实际: reality; practice保护: protect; defend; guard; safe ...率: rate; ratio; proportion实际保护: effective protection保护率: protection ratio; protective rate必要保护率: necessary protection ratio射频保护率: radio frequency protection ratio声频保护率: audiofrequency protection ratio视频保护率: video protection ratio音频保护率: af protection ratio有效保护率: effective rate of protection; effective vate of protection; epr effective protection rate实际保留体: actual retention volume实际保密度: practical security负有效保护率: negative rate of effective protection国际保护: international conservation; international protection国际保护部: department of international protection国际保护司: division of international protection实际保留体积: actual retenrion volume; actual retention volume卡介苗接种保护率: protective rate of bcg vaccination上行线路保护率: up link protection ratio预防接种保护率: protection rate of vaccination国际保护北海会议: international conference for the protection of the north sea国际保护动物协会: international society for the protection of animals国际保护文学艺: international union for the protection of literary and artistic works知识产权国际保护: international protection of intellectual property