释义 |
back upv.1To move backwards. 向后移动;后退;倒退。◆ The train was backing up.火车正在向后移动。2To help or be ready to help; stay behind to help; agree with and speak in support of.帮助;支持;证实。◆ Jim has joined the Boy Scouts and his father is backing him up.吉姆参加了童子军,他的父亲很支持他。3To move behind (another fielder) in order to catch the ball if he misses it. 跑到(另一名外场手)背后策应。◆ The shortstop backed up the second baseman on the throw.球掷出时,游击手跑到二垒手背后策应。 |