Children are not usually allowed in, but I'm prepared to make an exception in this case.

儿童一般不允许入内，不过这次我可以破例。

I know it's uncommon to offer a high school student this volunteer job, but I hope that you can make an exception for me, and I'll prove myself.

我知道让一个高中生做这种志愿工作并不常见，但我希望您能为我破例一次，我会证明自己的。

We can make an exception in this case.

此事可以通融。

Would you kindly make an exception for us this time?

请给通融一下。

Can you make an exception this time?

这次可以例外吗？