1.turn sth on its head 完全改变

He decided to turn this research on its head by studying young healthy men.

他决定调转研究方向，研究健康的年轻人)0J&(]0z&!([z85dnL!^。

2.be reluctant to do 不愿做某事

But in practice, countries are reluctant to do so, fearful that an excessively strong currency will hurt their exporters.

但在实践中，各国都不愿意这样做，担心货币过度强势会影响出口bBNTYqoxsjnB。