Definition
To experience a sudden shift, either positively or negatively, in condition or circumstances.
突然变好／变差
Since the company implemented the new management policies, morale has taken a turn for the better.
自从公司实施新的管理政策后，士气已经好转了。
His health took a turn for the better after the doctor started him on a new treatment regimen.
自从医生开始使用新的治疗方案后，他的健康状况有所好转。
The previously promising economy took a turn for the worse after new international situations emerged.
原本有前景的经济在新的国际局势出现后开始恶化。