U-turn：a complete change of ideas, plans etc
可数名词“掉头”，“转弯”，可引申为“改变”，开车时调头make a u-turn
例句：In the past two years, the local government has been utterly inconsistent with its policies, making various U-turns.
例句：If you want to be a respected leader, you had better avoid making too many U-turns when making decisions.
造句：If you make a decision after a long-time struggling，just don't make any u-turns when you start to do it.
翻译：He has made a U-turn and decided to remarry his ex-wife.
造句：Her attitude has made a U-turn after she knew the real status of that old man.
