To do a U-turn 來一個180度大轉(zhuǎn)彎

　　在駕駛時，U-turn 就是來一個180度的大轉(zhuǎn)彎或調(diào)頭。在現(xiàn)實(shí)生活中，這個短語的意思是形容對某事的態(tài)度或觀點(diǎn)來了一個180度的大轉(zhuǎn)彎，徹底改變。

　　例句

　　I’m afraid your father has done a U-turn and he won’t let you take his car at the weekend after all.

　　The university did a U-turn and decided not to expel the student.

　　請注意

　　另一個常用成語“at a crossroads 在交叉路口或十字路口”可以用來形容緊要關(guān)頭，需要做出關(guān)鍵決定的時刻。

　　例句

　　You’re at a crossroads now. You need to decide what you want to study. Arts or sciences?

　　Their marriage was at a crossroads. They could either try again to make it work or take the decision to split up.