ubound怎么读(unbound怎么读)

我们要学的词是U-turn。

音标：[ju:’tə:n]

释义：180度转弯。掉头；经常用来指彻底转变

例句：

He made a U-turn on his campaign promise of lowering taxes after being elected.

他当选后。彻底改变了减税的竞选誓言。