it sounds后面加什么

It sounds like a good idea, but I don't think it will work practically.

这个主意听起来不错，但我认为它实际上行不通。

It sounds like a good idea; let's look at the practicalities and work out the costs.

这个主意听起来不错。咱们来看看实际运作，计算一下费用。

I know it sounds crazy but it just might work.

我知道这事听起来很蠢，然而也许就会奏效。

I know it sounds corny, but it really was love at first sight!

我知道这听起来像陈词滥调，然而的确是一见钟情啊！

I know it sounds trivial, but I'm worried about it.

我知道这事听起来微不足道，但我还是放心不下。