U-turn
n
1 turn of 180 (by a car, etc) so as to face in the opposite direction without reversing (汽車等的)180轉彎, 向後轉, 掉頭
No U-turns, ie as a sign on motorways, etc. 禁止後轉彎(高速公路等的標牌用語).
2 (idm 習語) do a `U-turn (infml 口) reverse one's policy 徹底改變政策
The government has done a U-turnon its economic policy. 政府的經濟政策已經完全改變了.