protracted

1. ADJ Something, usually something unpleasant, that is protracted lasts a long time, especially longer than usual or longer than you hoped. 拖拉的[正式]

However, after protracted negotiations Ogden got the deal he wanted. 然而，經過拖拉的談判，奧格登還是得到了他想要的那筆交易。

...a protracted civil war. …一場曠日持久的內戰。