I regret to say I can't accept your suggestion.

很遗憾我不能接受您的建议

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1. I'd like that, but I can't afford the time. 我倒是希望那样，但我抽不出时间。

2. Well, I'd rather not if you don't mind.哦，如果你不介意的的话，我还是不这样的好。

3.No,don't bother.不，您别费心了。

4.No,can't be done.不，不行。