() () ( ˌbest enˈdeavours) (often used in contracts) all the possible actions that you can take in order to achieve sth （常用於合同）尽最大努力◆We will use our best efforts to deliver the goods on time. 我们将尽最大努力准时交货。◆The software is supported on a best-efforts basis. 这软件的技术支援建立在勤勉尽责的基础之上。
() in the US, if a financial institution (such as an investment bank ) uses a best-efforts method to sell the shares in a new company, they agree to sell as many shares as they can, but do not promise they will sell them all. Any they do not sell will be returned to the company. 尽最大努力推销股票（指美国的金融机构，但不承诺可以全部售出，任何没有售出的股票都将退回原公司）