这句是句口语 翻译的重点不是要让句子有多复杂而是要明确让对方明白你的立场
翻译:You didn't realize how serious the problem is,Moreover you are still trying some (stupid) excuses to cover/make up your own Mess/mistakes
加()和/ 部分你自己选择吧。口语和做题两种不同要求
You are not only found the risk of this problem but also make excuse to cover your own mistake.
You didn't realize the seriousness of the errors, but you are still looking for the excuses to cover up your faults.
Not only do you not realize the seriousness of the problem, but also constantly looking for an excuse to cover up their mistakes
you havn't realized the severity of the proble, but still trying to make up of different excueses to cover the mistake you have made.