to no effect
US /tə nō ɪˈfekt/
UK /tə nō ɪˈfekt/

1.
沒有效果, 徒勞
without producing the desired or intended result
:
•
They tried to persuade him, but to no effect.
他們試圖說服他,但沒有效果。
•
All her efforts were to no effect.
她所有的努力都沒有效果。
沒有效果, 徒勞
without producing the desired or intended result