back/bæk/ [] to give support or help to sb/sth支持；帮助◆Leading businesses have backed plans to reduce VAT.卓越的企业支持减低增值税的方案。◆union-backed candidates工会支持的候选人➡ see note at finance ●ˌback ˈout (of sth)to decide that you are no longer going to take part in sth that has been agreed退出；撒手◆The company is still for sale after a prospective buyer backed out of the deal.一位潜在买主退出这笔交易后，这公司仍可供出售。●ˌback sth ˈup () to prepare a second copy of a file, program, etc. that can be used if the main one fails or needs extra support为（文件、程序等）做备份；备份◆I back up all my files on CD-ROM once a week.我每周将所有文件备份到只读光盘上。➡backup to provide support for sb/sth支持；支援◆The sales manager is backed up by an experienced team of reps.由经验丰富的销售代表组成的团队辅助销售经理。➡backer