英语词组back-up是什么意思，短语翻译、用法及例句-英语词组固定搭配大全

词组	back-up
释义	back-upadj.Supplementary; auxiliary; kept in need for safety. 后援的；补充的；辅助的；后备的，备用的。◆ When at war, it is essential to keep the lines open for back-up troops and supplies.战争期间，必须确保运输后援部队和军需品的线路畅通。◆ When the policeman saw what happened, he called in for back-up support.那位警察看到现场发生的情况后立即打电话要求增援。
随便看	joking aside or joking apart jot down jug-eared juice dealer jump all over jump all over jump at jump bail jump bail or skip bail jump ball jump down sb.'s throat jumping-off place jump on jump on or jump all over or land on or land all over jump on the bandwagon jump on the bandwagon or get on the bandwagon jump out of one's skin jump pass jump-start jump the gun jump the gun also beat the gun jump the track jump through a hoop jump to a conclusion junked up

英语词组固定搭配大全包含9718条英汉双解词组，基本涵盖了全部常用英文词组、短语的翻译及用法，是英语学习的有利工具。