我们迫不得已去看了那场歌剧。 We were dragooned into going to the opera.
许多医生推荐含有丰富食物纤维的天然食物,因为它有助于防止便秘,以取代万不得已而使用的泻药。原因显而易见-治病总是不如防病。 Many doctors prefer a natural food, rich in dietary fibre, which will help you to avoid constipation, rather than having to resort to purgatives. The reason is obvious-prevention is always better than cure.
魔鬼所逼,不得已也。 Needs must when the devil drives.
我是万不得已才说的,但你是咎由自取。 It grieves me to have to say it, but (ie It is regrettably true that) you have only yourself to blame.