take a turn for the better 好转；转机

【例句】
I believe the market will take a turn for the better next month.
我相信下个月市场将会好转。

Relax! When things appear at their bleakest, your life is just about to take a turn for the better.
放松！当情况显得凄凉、绝望的时候，你的生活即将出现转机。