[] an agreement between two companies to join together(两家公司的)联合,合作◆a tie-up between HNC and ArribaHNC 与艾利芭软件公司之间的合作◆The Japanese company is looking for a tie-up with a European car manufacturer.这家日本公司正在寻求与一家欧洲汽车制造商之间的合作。➡tie up with sb/sth at tie verb