To get something unpleasant over with because it is necessary to do so. (To bite the bullet in a scenario is to perform the task regardless of its impact). 因為必須做，所以就咬牙做了，不論有多困難多不想做。

To get something unpleasant over with because it is necessary to do so. (To bite the bullet in a scenario is to perform the task regardless of its impact). 咬牙決心去做某件事，不論它有多困難或是影響有多大，因為必須做。