turn the tide
US /tɜrn ðə taɪd/
UK /tɜrn ðə taɪd/

1.
扭转局面, 力挽狂澜
to reverse the general tendency of a situation, especially from bad to good
:
•
The new strategy helped to turn the tide of the failing business.
新策略帮助扭转了这家失败企业的局面。
•
With a last-minute goal, they managed to turn the tide of the game.
凭借最后一分钟的进球,他们成功扭转了比赛的局面。