我们曾有一段长久、愉快而富有成效的关系。

We had a long, happy, fruitful relationship.

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事实证明他们的努力是有成效的。

Their efforts have been proven fruitful.

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他们正在证明为什么教学是一种卓有成效的学习方式，并设计了创新的方式让年轻人参与教学。

They're documenting why teaching is such a fruitful way to learn and designing innovative ways for young people to engage in instruction.

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Of course, he turns it into productive purpose, so there are a couple examples from that article.

当然,他将其转化为有成效的想法,那篇文章上有一些例子

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and it's been a really rewarding experience and I'm glad that it's something that I've done.

有了一段富有成效的经历。我很高兴我选择了这份工作。

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My last converstaion with him wasn't very productive.

我们上次的对话,不是十分有成效。

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