我们同首相进行交涉，但没有效果。

We have made representations to the prime minister, but without success.

《牛津词典》

我进入驾驶舱，把灭火器对准火焰喷射，但没有效果。

I reached the cockpit and directed the extinguisher at the fire without effect.

《柯林斯英汉双解大词典》

要是你用了这种方式但没有效果怎么办？

What if this approach doesn't work for you?

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