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单词	backup
释义	back·up (băkŭp′) n. 1. a. A reserve or substitute. b. Computers A copy of a program or file that is stored separately from the original. 2. a. Support or backing. b. Music A background accompaniment, as for a performer. 3. An overflow or accumulation caused by clogging or by a stoppage: a backup in the sink; a backup of traffic at the drawbridge. adj. Extra; standby: a backup pilot.
随便看	Indo-European root: weik- Indo-European root: weik- Indo-European root: weik- Indo-European root: weip- Indo-European root: weiə- Indo-European root: wekti- Indo-European root: wekw- Indo-European root: wel- Indo-European root: wel- Indo-European root: welə- Indo-European root: wemə- Indo-European root: wen- Indo-European root: wen- Indo-European root: wer- Indo-European root: wer- Indo-European root: wer- Indo-European root: wer- Indo-European root: wer- Indo-European root: werg- Indo-European root: wers- Indo-European root: wes- Indo-European root: wes- Indo-European root: wes- Indo-European root: wes-pero- Indo-European root: wesr̥

英语词典包含135693条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。