基本解释同时, 协同地,联合地。同根派生 英汉例句用作副词 (adv.)He came in, preceded by his wife.他和他的妻子一前一后地走了进来。英英字典剑桥英英字典at the same timeIf two pieces of equipment, people, etc. are working in tandem, they are working together, especially well or closely.