I'm glad to inform you that we are willing to accept your offer.
我很高兴地通知您，我们非常乐意接受您的方案。
Your suggestion has been analyzed and found to be an extremely viable idea.
经分析验证，您的提议是十分可行的。
We are willing to meet you and talk about your suggestion.
我们很想与您当面谈谈您的提议。

We regrettably must turn it down.
很遗憾，我们必须否决它。
Thank you for your offer, but unfortunately we must decline it.
非常感谢您的方案，然而遗憾的是，我们无法采纳它。
We regret that your grant proposal has been turned down.
很遗憾，您的拨款提案被否决了。