U-turn

剑桥词典

a turn made by a car in order to go back in the direction from which it has come
U 型轉彎，180度轉彎
It is illegal to do/make a U-turn on a motorway . 在高速路上掉頭是違章的。
mainly disapproving
a complete change from one opinion or plan of action to an opposite one
（觀唸或行爲上的）徹底轉變
The prime minister did/made a quick U-turn in response to all the adverse publicity . 麪對所有這些不利宣傳，首相的態度來了個180度的大轉彎。 返回 U-turn