单词	back-up
释义	请查阅词条：backup
随便看	be on a diet be on a hiding to nothing be on a hiding to nothing be on a level with be on a loser be on an equal footing with be on a par with be on a short fuse be on at be on at sb be on at somebody be on at someone be on at someone be on best behaviour be on borrowed time be on cloud nine be on easy street be one of the cast be one's age be one's brother's keeper be one's brother's keeper be oneself be oneself be oneself be one's job 败落败血症败诉败谢败象败走败退败选败阵败露 Wasserdurchtritt Wasserdüsenbad Wassereinfüllstutzen Wassereingang Wassereinlauf Wassereinlaufrohr Wassereinlaß Wassereinspritzung Wassereintritt Wassereintrittsgeschwindigkeit