帮个忙，翻译一句英语

It's no use to chicanery because you have made such a serious mistake.

As you have committed such a serious mistake,it is no use to chicanery

You made such a serious mistake, so it is no use to quibble any more.

What you said is no use for making such a serious mistake.

You have made such a sever mistake, there is no use to make any excuses.

2楼的不对，应该是这样的。
You have made such a serious mistake, there is no use to make any excuses.